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Hi new to the forums here and was wondering if you guys could help me estimate my hp/tq.
383 stroker with flat top pistion.
64cc heads, stage 1 ported, and valve size undiced at this point either 194/150 but most likely will be 202/160 if you can give me numbers for both that would be great.
cam: hi rev from 2800-6000 int/exh both 224 and lift both 436
going with and edlebrock dual plane air gap intake
750 cfm carb. havent decicded wether to go with edlebrok or holley
thanks Tom
Comp Cams simulator software with XE262 cam and headers shows:
194/150: 358 hp, 428 tq
202/160: 374 hp, 432 tq
I had a 388, which I think is just 60 over bore instead of 30 over. Approx same heads
as yours, ran a comp hyd roller cam I think about 500 lift, pistons were 10.5 CR
with two 500 cfm four barrels. HP was at around 500, and it would pull a stump out
of the ground...Good engine to about 6500 rpm which is hi enough...Sorry I got rid of
it..If you buy a cam, call the mfg, and go with the complete kit, springs, lifters, cam,
push rods etc..I also went with studs in heads as well as block....
Thanks for your help guys.
I bought the stroker kit it came with the crank flat top pistons, cam, hi rev lifters, timing chain, oil pump, and all the gaskets.
The heads I'm getting support up to a .510 lift.
Since I'm new to this building stuff I also have another question about rockers. I know if I get 1.6 over the 1.5 it gives me more lift but what kinda difference does it make. Also should I get full Roller rockers or would I be ok with the stamped ones with the roller tips. I'm kinda on a budget.
I use to know the difference in 1.5 vs 1.6 , but it's been 15 yrs ago. I think you
would be looking at about an extra 10 or so on the lift..I had the 1.6 with no problems.
with 510 your with 1.6 rocker would be 034or so 544 lift watch you push rods slots or holes in the head that they will not hit with the 1.6 arms your spring rate could need to be move up
Realy I didn't think it would increase it that much. If it wouldn't increase the hp/tq that much I think I would stick with the 1.5.Quote:
Originally Posted by pat mccarthy
Oh my lift right now is only 436 the 510 is what the heads support.
well i would use some thing like 235/235 472/472 108 on 108 if hyd flat cam .but a hyd roller cam is what i would use with 1.6 rockers 584/548 238/246 on 108 if 10.5 cr 242/250 584/548 on 108 av 2, 3500to 6500 this cam will make it move :) or just use your cam
Famed cam grinder Racer Brown did some high speed photography on roller tip rockers and discovered that, due to the small diameter of the roller, it had more of a tendency to skid across the tip of the valve rather than to roll across. Ever since I learned that, I have had no respect for the roller tip rockers. Now, the roller trunnion, on the other hand, is a completely different story. Moving away from the high-friction ball and socket and replacing it with needle bearings will not only free up some horsepower from reduced friction, it will also lower operating oil temperatures.Quote:
Originally Posted by 84transamdude
I'd like to see someone make a roller trunnion with a conventional tip.
Interesting
Ok so I guess maybe tomarrow or Monday I will post pics of my block before machine work and as I'm building up the block.
yep i said it many times roller tips are a wast of money .i just do not wast my time on it any more on here just like gear drives
However----for the fords individual rockers a few years ago-- there was/is? a roller trunnion available
there was one for the boss where they did use them on the bbc 1.7 many years ago??? not sure on the 1.5. i do know theres is hi rent stuff that has no roller tip jesel? i think did some testing with out the roller tipQuote:
Originally Posted by jerry clayton
Just noticed this. Static compression ratio will be in excess of 11.0:1 and probably won't work with any available pump fuel except E85. If you're hung up on 64cc heads, use 18cc D-cup pistons to bring SCR down to 9.7:1 so you can run pump gas. If you're hung up on flat-top pistons, use heads with 76cc chambers to bring SCR down to 9.7:1.Quote:
Originally Posted by 84transamdude
Unless you've built hundreds of motors, don't try to choose the cam yourself. Call up your favorite cam grinder and talk with a tech there. He will get you much closer to correct than you can do yourself, picking one out of thin air. ;)Quote:
Originally Posted by 84transamdude
Wrong choice. Use a high-rise such as the RPM or Weiand Stealth. 750 carb is the correct size to use.Quote:
Originally Posted by 84transamdude
I talked to a tech on the phone when I ordered he said compression ratio would be 10.4 unless I told him be accident 68cc heads. As far as the cam goes a guy I know builds motors somewhat and drags his car helped me pick it out. I wanted somewhat of a choppiness to it but not to much that's why he said that one.