Drawing Board - possible 525/540 engine build

[67cherry]

Okay so for a few weeks I've been trying to figure out what I want to do for a new engine in my 67 chevelle. Here's what I've come up with so far... I'm building for a roots type blower so Ill keep the static comp. around 8.5 or so. Feel free to shoot this down - that's why I'm posting it, ha. Also feel like I need to mention that I will be running off of pumpgas bc it will be a street/ strip car not just drag.

Dart 9.8" block preferably w/ 4.125" stroke
(525cid so its not ridiculous on the road... can do a 540 combo though)
Dart 18 degree Race series oval port heads w/ 330cc runners etc...
comp cams solid roller grind:300BR-14 lift:0.652, 0.652 and duration @ .50: 255, 262 (cam is for superchargers)

*this is just the foundation for now but I'm open to advice or thoughts - please be honest - I want this thing to be right. If you think a blower would put this over the edge for the street as well please let me know. I've never built an engine with a blower so I'm not sure how it'll workout with the camshaft and displacement i've chosen to work with. If you think I need to go with a hydraulic roller or cam with different specs instead please make a suggestion on a replacement cam.

-Thanks

[34_40]

For me the 2 "easy" ones are to definately run a hydraulic roller cam, and if it isn't a race vehicle, that's a lot of cylinder head for a street car.

[Dave Severson]

Just my opinion, but at one point you mention "so it's not ridiculous on the road" then list a lot of parts that are probably best left for race use...... If you want good, streetable horsepower, and a car that the fuel mileage is so poor in that a road trip requires a bank loan for fuel you might want to consider leaving this engine as a someday dream for a drag car and go with some LS power!!!! Read some of Jerry Clayton's posts on what his son Corey is getting out of the LS engines! Phenomenal, and still a very well-mannered street/highway go-fast machine..... Heck, you can get 525 horse out of a crate engine LS and have a 3 year warranty with it!!!! With the streets and highways the way they are these days, hooking up anything beyond about 600 horse is near impossible anyway.....and if you do the cops are going to be all over ya trying to impound the thing!!!! I'm sure you'll probably disregard this post, just wanted to offer some advise from a been there, done that perspective.....

[pat mccarthy]

Okay so for a few weeks I've been trying to figure out what I want to do for a new engine in my 67 chevelle. Here's what I've come up with so far... I'm building for a roots type blower so Ill keep the static comp. around 8.5 or so. Feel free to shoot this down - that's why I'm posting it, ha. Also feel like I need to mention that I will be running off of pumpgas bc it will be a street/ strip car not just drag.

Dart 9.8" block preferably w/ 4.125" stroke
(525cid so its not ridiculous on the road... can do a 540 combo though)
Dart 18 degree Race series oval port heads w/ 330cc runners etc...
comp cams solid roller grind:300BR-14 lift:0.652, 0.652 and duration @ .50: 255, 262 (cam is for superchargers)

*this is just the foundation for now but I'm open to advice or thoughts - please be honest - I want this thing to be right. If you think a blower would put this over the edge for the street as well please let me know. I've never built an engine with a blower so I'm not sure how it'll workout with the camshaft and displacement i've chosen to work with. If you think I need to go with a hydraulic roller or cam with different specs instead please make a suggestion on a replacement cam.

-Thanks

well i built many bbc for street to water.mud .hill climding if you want a bbc i can help. your post said 4.125 you mean 4.250 x4.500 bore ?or 4.125X4.600bore 548 or 4.000x4.600bore 531? your going to use the dart marine 18. heads? why? they were built for this use ?could use the pro one 335s or 345 pro ones or 355 i have a set i would sell 345s and 355s the solid roller will work fine on the street with hippo s roller lifters cam is tame if you going to look for big HPnumbers i would keep away from hyd roller lifters in this build less your going short valved travle hyd roller lifters you can take this to PM if you want or get my thoughts on builds with a 9.800 deck block.the 330 runner is not hard to get in a head that will be easer to get ?building a hi hp car for the street is not new . cops are going to give you a hard time if your racing in town no matter if you have 325hp or 1500hp

[Richy]

Hi, my advice,,,,I have a 4-bolt bbc block and wanted to build a blower Rat. Like everyone else I'm limited with toy funds too. I can't afford to buy tons of expensive parts and be disappointed. I'm copying a dyno proven pump gas 830 hp@6400 rpm 496 bbc 8-71 Blown Rat. I'm using same crank, rods, pistons, rings, cam, lifters, heads etc...following their build. The Co that builds these turnkey engines offer a one year warranty too. I called them and asked questions, most of engine specs was on their web page. They build the blower engines with the mindset that a street rod person is buying it. Paying someone to install it and only knows how to put gas in tank and drive...They have been building blown engines since 1989...know what parts work for reliability and hp levels...