Sorry in advance for all the questions
I haven't taken apart the c code that's in the car now so I'm not positive on the deck clearance but as best I could find I should be around 9.2:1 compression (definately between 9.0 and 9.4) with the dooe heads mentioned above. I've specced out my prospective cam as a Comp cams 31-333-4 solid flat tappet (270/270 adver, 224/224 @.050, .499/.499 lift, 110* sep). The heads have studs and 1.6 full roller rockers, and springs that could've handled the .557 lift I had originally spec'ed in my 351 cam. Carb is a holley DP 650. Through all this I've developed quite a few questions:
Will I have issues with piston-valve clearance with the .499 lift on a stock 289 with the larged valves? Is the cam choice pretty decent for a light manual street car? Will i need to do anything special swapping the stock hydraulic cam for the solid? Is there any fitment issues with the DOOE heads on a 289 other than the special wider-shoulder head bolts? Is there fitment issues with the 351 heads with a perf RPM manifold or weiand stealth intake? Which of those two manifolds is better for my application? I also had bought hedman 351w swap shortie headers (1 5/8 primaries) for the 351 that was going to go in the car, can I use these on the 289 instead or will i have clearance issues? Anything else I should be considering? Any speculations on what kind of power I can expect to be making? (Goal with the 351 was 400hp at the crank, I realize this will be much lower) Thanks a TON in advance to anyone with the time to reply
I haven't taken apart the c code that's in the car now so I'm not positive on the deck clearance but as best I could find I should be around 9.2:1 compression (definately between 9.0 and 9.4) with the dooe heads mentioned above. I've specced out my prospective cam as a Comp cams 31-333-4 solid flat tappet (270/270 adver, 224/224 @.050, .499/.499 lift, 110* sep). The heads have studs and 1.6 full roller rockers, and springs that could've handled the .557 lift I had originally spec'ed in my 351 cam. Carb is a holley DP 650. Through all this I've developed quite a few questions:
Will I have issues with piston-valve clearance with the .499 lift on a stock 289 with the larged valves? Is the cam choice pretty decent for a light manual street car? Will i need to do anything special swapping the stock hydraulic cam for the solid? Is there any fitment issues with the DOOE heads on a 289 other than the special wider-shoulder head bolts? Is there fitment issues with the 351 heads with a perf RPM manifold or weiand stealth intake? Which of those two manifolds is better for my application? I also had bought hedman 351w swap shortie headers (1 5/8 primaries) for the 351 that was going to go in the car, can I use these on the 289 instead or will i have clearance issues? Anything else I should be considering? Any speculations on what kind of power I can expect to be making? (Goal with the 351 was 400hp at the crank, I realize this will be much lower) Thanks a TON in advance to anyone with the time to reply