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I was wondering if could stroke and put a 6.71 blower on a 305?? me and my stepdad built a 305 and with a holley 750 double pumper he thinks it has around 350 to 375 RWHP. and with what it has and a stroker kit that i wanna put in it if i could use a 6.71 blower on it with out problems or not. my intake is setup for a wet shot of nitrous but i dont have copper head gaskets so i dont wanna use nitrous. that is y i need to know about the blower. thank you if you can help or give advise.
Did you build the 305 with forged pistons, aftermarket rods, crank, fasteners and all the other stronger than stock goodies that you'd need to take the extra torque of a blower?
What compression ratio is the 305?
I don't think ya got 350 hp at the rears, takes a lot to get that with a 305. You could have 300-320 tho. You need good pistions, crank and a set of H beam rods if you want it to last. You need a static compression of 8:1 if you want to run 8-10 lbs of boost.
Thanks guys i do have forged pistons and and the stuff i was told to have but i have 9:1 compression. i dunno about the hp but i do know that the motor will pick up my 87 camaro off the ground and it scares the crap out of me i think it awesome. i hope to put the motor in an 80's model s-10 in the near future. i was also wondering if anybody knew where an 80's model s-10 is with a decent body and it doesnt matter running or non. id prefer extened cab but what ever works. thanks for your guys help
i am just nearing the firing up and break in on my 331" (stroked 305)....used 76 400 crank, rods are stock 350, a little beefier than the 305 rods same length. heavily ported 416 heads with 1.84" intake and 1.5" exhaust, both have been swirl polished, screw in studs and 1.5:1 comp roller tips, Custom Colt Cams 270 magnum
221@.050 .465" lift 108LSA......runnng an edelbrock oldschool torker and a 600 holley.......I have a pretty good idea it will have some decent power. When i run it i will post the results, this will see a chassis dyno after christmas.....im not sure on the numbers but if it made 320 at the rear wheels i'ld be very happy cause I only put in about 1600 cdn into it. Its not a bad motor, but the extreme porting and polishing i did on the heads are what will make the difference. I think the cam i chose is a good choice, I may switch to 1.6:1 rockers after check for clearance issues with the piston. Im stayed conservative with the lift in the begining due to the unknown piston to valve clearance but if it will work the 1.6:1 will bring the lift to .496". we'll see, .....hope this helps.....also if you are going to run a 671 you need to o-ring the block, and definately use 1.94: intake valve. you should be fine with your intentions but use beefier rods and a forged crank and also install splayed 4 bolt main caps. lots a psi on those small pistons. but i will work
Cometic makes steel shim head gaskets that will work with supercharged engines and require no special machining be performed.
Ok thanks again guys that will deff help thank you. i hope too start rebuilding the 305 again with all of your guys input thanks i should have it done and in a car or s-10 by next summer cause im in college and im working on it when i can afford to go back to my house on the weekends. i will post the dyno results on here when im done.
thanks again to 81 cabellero for all the numbered info that helps with the new plans for the motor thanks
In all the years I have run a 6-71 or N20 in a street car I have never had to o-ring the block.If you use good head gaskets make sure both the block and the heads are flat and follow your torque specs you should be all right.Chances are you will detanate the engine on pump gas before you run into head gasket problems.The splayed caps are little over-kill also.A good early 70's block with a 4-bolt main and a stud kit will handle 575 to 600 h.p. for short periods of time.Quote:
Originally posted by 81 cabellero
i am just nearing the firing up and break in on my 331" (stroked 305)....used 76 400 crank, rods are stock 350, a little beefier than the 305 rods same length. heavily ported 416 heads with 1.84" intake and 1.5" exhaust, both have been swirl polished, screw in studs and 1.5:1 comp roller tips, Custom Colt Cams 270 magnum
221@.050 .465" lift 108LSA......runnng an edelbrock oldschool torker and a 600 holley.......I have a pretty good idea it will have some decent power. When i run it i will post the results, this will see a chassis dyno after christmas.....im not sure on the numbers but if it made 320 at the rear wheels i'ld be very happy cause I only put in about 1600 cdn into it. Its not a bad motor, but the extreme porting and polishing i did on the heads are what will make the difference. I think the cam i chose is a good choice, I may switch to 1.6:1 rockers after check for clearance issues with the piston. Im stayed conservative with the lift in the begining due to the unknown piston to valve clearance but if it will work the 1.6:1 will bring the lift to .496". we'll see, .....hope this helps.....also if you are going to run a 671 you need to o-ring the block, and definately use 1.94: intake valve. you should be fine with your intentions but use beefier rods and a forged crank and also install splayed 4 bolt main caps. lots a psi on those small pistons. but i will work
well thanks again. i have an 87 camaro and i have too run a full tank of premium with 5 gallons of racing fuel mixed or my 305 wont even start. if i put regular in it its like its burning water and it sometimes runs and sometimes doesnt with regular so i have to mix premium and race gas i would run straight racing fuel but its too expensive.
With a 9:1 engine you can run on 89 octain all day.In your last post you mention running premium gas and mixing it with race gas.WHY?Quote:
Originally posted by camaro305stroke
Thanks guys i do have forged pistons and and the stuff i was told to have but i have 9:1 compression. i dunno about the hp but i do know that the motor will pick up my 87 camaro off the ground and it scares the crap out of me i think it awesome. i hope to put the motor in an 80's model s-10 in the near future. i was also wondering if anybody knew where an 80's model s-10 is with a decent body and it doesnt matter running or non. id prefer extened cab but what ever works. thanks for your guys help
well my stepdad and me rebuilt this engine twice and the first time we did it we use what he said was 13:1 keithblack high dome pistons and that was the gas we used. then we rebuilt it again cause we got bored and he said that i couldnt supercharge it with the high domes or that much compression so we put the flattops that were in it in the first place and we just never stopped with that. the car seemed to run alot better on it so that is what i used. but one day just a little while back i took it onto the road and punched it and it lifted off the ground and the unibody twisted and broke my windshield. so i took the motor out of the car and put it on the engine stands and im looking to build it more there and then find a car or s-10 in the near future.
All I can really say is WOW!! A 305 with 350 to 375 rear wheel horsepower and it lifted off the ground and broke the windshield and on the street too.I would love to see this.You really must have the chassis dialed in.What size rear tires do you run?Quote:
Originally posted by camaro305stroke
well my stepdad and me rebuilt this engine twice and the first time we did it we use what he said was 13:1 keithblack high dome pistons and that was the gas we used. then we rebuilt it again cause we got bored and he said that i couldnt supercharge it with the high domes or that much compression so we put the flattops that were in it in the first place and we just never stopped with that. the car seemed to run alot better on it so that is what i used. but one day just a little while back i took it onto the road and punched it and it lifted off the ground and the unibody twisted and broke my windshield. so i took the motor out of the car and put it on the engine stands and im looking to build it more there and then find a car or s-10 in the near future.
"just a little while back i took it onto the road and punched it and it lifted off the ground and the unibody twisted and broke my windshield."
hahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahaha.
well i run an old set of mickey thompsons tubeless tires. they are 18" wide and i have to use a 10" wide weld racing rim. i bought them from a garage sale for 75 bucks, the chassis is rusty. but i put a set of shocks on the front that my stepdad said would lift the front end off the ground. i have a set of 4:10 gears in the rearend and that helps too but the car is now gone and all i have left is the motor until i find a better car. i was told that an oldschool ferrari or porshe is a full frame car that can handle up to 1000 hp without anything like a stablizer or anything to help support the frame i dont know for sure but that is what i heard.
You went wheels up on the street with a 305 in a full bodied Camaro???????? Man, I'd buy a ticket for that show !!!!!!!!!! So, how big was the bump in the road that launched the front wheels????? But hey, it's Saturday and I needed a good laugh!!!!!!!
Now that was not very nice.Quote:
Originally posted by techinspector1
"just a little while back i took it onto the road and punched it and it lifted off the ground and the unibody twisted and broke my windshield."
hahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahaha.
hahahahahahahahahahahahahahahahahahahahahahahahaQuote:
Originally posted by erik erikson
Now that was not very nice.
I was born at night but not last night.L.O.L.
"well i run an old set of mickey thompsons tubeless tires. they are 18" wide and i have to use a 10" wide weld racing rim."
hahahahahahahahahahahahahahahahahahahahahahahahahaha
Stop it, you're killin' me :LOL:
Did I ever tell you guys about the time I was racing Big Daddy Don Garlits back in 1971? Of course I was only 4 then.Or was Don the snake Purdome.Sorry my spelling of the snakes last name might be a little off.
18" tires on 10" wheels????? I'd buy a ticket for that show, too!!!!!!! Just a note, but don't most fairy tales start with "once upon a time in a land far, far away"?????
i have 18" wide tires on 10" wide weld rims. if you guys need proof. ill try to upload the pics of the tires and rims and of the motor. after the windshield broke i decided to get rid of the car because the underside was too rusty so i only have a pic of the car when it had a v6 in it and it was red with gold rims. my rims look a little fucked up with the tires but thats how i bought them from the guy that runs a car at new paris speedway in new paris IN.
I also had one more question. does anybody know much about a 701/2 camaro because my real dad has one with 25,000 original miles and its mine when im out of college. and i dont know much about it??????????????
with a set of 4:10 gears and the front suspension set up right you can lift any car off the ground. and speed bumps help if you dont do anything to the suspensionQuote:
Originally posted by Dave Severson
You went wheels up on the street with a 305 in a full bodied Camaro???????? Man, I'd buy a ticket for that show !!!!!!!!!! So, how big was the bump in the road that launched the front wheels????? But hey, it's Saturday and I needed a good laugh!!!!!!!
well i talked with the step dad and got some money and now i need a car because i bought a set of M and H racemaster 14" wide slicks, 6.71 jimmy blower,2- 750 holley carbs, and a 50 shot wet shot nitrous system. i also going to run a turbo 400 tranny with a 3500 stahl conveter and a B and M shift kit. and when i find a better camaro or an 80s S-10 that will be my new toy im not going for expensive i doing it oldschool. my 58 cc heads will help a little too.
We all have dreams.A lot of the people on this forum have free knowlege.All you have to do is ask.We will listen to what you have to say.After all we where all young once to.Just sit back and read the forums.We all want to help.Quote:
Originally posted by camaro305stroke
well i talked with the step dad and got some money and now i need a car because i bought a set of M and H racemaster 14" wide slicks, 6.71 jimmy blower,2- 750 holley carbs, and a 50 shot wet shot nitrous system. i also going to run a turbo 400 tranny with a 3500 stahl conveter and a B and M shift kit. and when i find a better camaro or an 80s S-10 that will be my new toy im not going for expensive i doing it oldschool. my 58 cc heads will help a little too.
"my 58 cc heads will help a little too."
The only way they'll help a blower motor is if you don't use 'em. With a big Jimmie huffer, you'll need static compression ratio down around 7.5:1 to make it work right. To do that with tiny little chambers, you'll have to use pistons that look like they've got tunnels in 'em and that'll screw up flame propogation. Pull your head out and read this piece I wrote on blowers, then get one of the books I've listed at the bottom and read all about street supercharging before you go any further.
http://streetmachinesoftablerock.com...topic.php?t=81
WOWQuote:
Originally posted by camaro305stroke
with a set of 4:10 gears and the front suspension set up right you can lift any car off the ground. and speed bumps help if you dont do anything to the suspension
hey sorry about what ive posted but i have bought all that to use because my stepdad said it will work. but now that i know what know from you guys i will not use the heads. sorry if i have offended anyone but have a lot of ppl telling me a lot of things and i had won a lawsuit from a car accident and that is what i use to buy all the parts. i thank all of you for helping. but when im done with whatever i find for the motor i will be at oceola drag strip in oceola indiana. i will post what ever i do next or what car i put it in so if your in indiana on saturdays next season you can come check out what my lil 305 can do cause im still not for sure yet.
Thank you techinspector for your info on blowers that helps extremely
good topic
man why would you consider ruining a ferrari by running a small block, all you need is a decent chevy, elcaminos have full frames, thast what im running, even if its not a full frame add sub frame connectors. Up here in vancouver canada, theres a guy i see racing all the time in a 63 nova, back halfed, no connectors, very healthy sprayed SBC running consistant 8.8's in the quarter, barely a twist when he launches off the line. I would seriously reconsider you choice of vehicle. The 305 in race form is a decent motor, small on cubes, i'ld consider running it in a light car like a nova, vega, etc. My combo is a pretty serious build for the 305, but in my 81 elky realistic numbers i'll run are low 13's in the quarter. I may be adding a 100 shot of spray but thats pretty much all the bottom will take. IMO would consider running a light car, i have seen a mild 305 in a vega run 13.9 in the quarter, not bad considering it had a very mild cam. Its a weight issue too, no need to go out and buy an exotic car, you'll find you will have way more stuff that has to be done to the suspension and chassis in a ferrari to get a chevy drive train in it. In my opinion not worth it. Keep it simple and consistant, it will last way longer and be more fun to drive.Quote:
Originally posted by camaro305stroke
well i run an old set of mickey thompsons tubeless tires. they are 18" wide and i have to use a 10" wide weld racing rim. i bought them from a garage sale for 75 bucks, the chassis is rusty. but i put a set of shocks on the front that my stepdad said would lift the front end off the ground. i have a set of 4:10 gears in the rearend and that helps too but the car is now gone and all i have left is the motor until i find a better car. i was told that an oldschool ferrari or porshe is a full frame car that can handle up to 1000 hp without anything like a stablizer or anything to help support the frame i dont know for sure but that is what i heard.
oh okay well thank ill just keep it chevy then. i was just told that about ferrari's and i was gunna use a wrecked one or one with a bad motor. but ill look for a nova or vega. i think there is a nova by my house its pretty rusty but its deff. fixable. if i could find a monza that would be cool too i was told you can put 350s in those im not for sure on this but it would be cool to do. theres not much of a selection of elkys around here. but there is old camaros