Joined
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16 Posts
Here's the deal:
My 454 has the following specs:
1. APPROX- 9.3 or so to ONE compression???
2. Comp Cams- Extreme Energy XE 274 hydraulic:
230/236 degrees of duration at .050", .553"/.555" lift 110 Lobe separation angle.
3. Performer RPM intake manifold
4. Holley 750 vac. secondaries
5. Sanderson Shortie block hugger headers- 1 7/8" primaries, 2.5" collector
6. 2" side exhaust pipes with a 12" glasspack welded in to kill some noise (and horsepower)
7. HEI distributor
I have been VERY DISSATISFIED with this motor. (1500 miles) The motor lacks power big time. A stock 283 seems to has more power!
I am in the process of buying some 2" long tube JETHOT coated Heddman headers for it and scrapping the current restrictive exhaust. I also have Magnaflow mufflers. I am hoping this will make a significant difference in performance to start out with. The car will then be taken to a dyno shop for tuning.....
I have read other postings on this forum with this camshaft. They state that they can light up the tires at will. I haven't been able to do so with the 3.08's........ I did change out the rear gear ratio from 3.08's to 3.70's but haven't gotten on it (breaking in the gears)
Any comments here? I sure would appreciate it....
Thank you,
Bob Turner
1974 Corvette 454, Richmond six speed, 3.70's
My 454 has the following specs:
1. APPROX- 9.3 or so to ONE compression???
2. Comp Cams- Extreme Energy XE 274 hydraulic:
230/236 degrees of duration at .050", .553"/.555" lift 110 Lobe separation angle.
3. Performer RPM intake manifold
4. Holley 750 vac. secondaries
5. Sanderson Shortie block hugger headers- 1 7/8" primaries, 2.5" collector
6. 2" side exhaust pipes with a 12" glasspack welded in to kill some noise (and horsepower)
7. HEI distributor
I have been VERY DISSATISFIED with this motor. (1500 miles) The motor lacks power big time. A stock 283 seems to has more power!
I am in the process of buying some 2" long tube JETHOT coated Heddman headers for it and scrapping the current restrictive exhaust. I also have Magnaflow mufflers. I am hoping this will make a significant difference in performance to start out with. The car will then be taken to a dyno shop for tuning.....
I have read other postings on this forum with this camshaft. They state that they can light up the tires at will. I haven't been able to do so with the 3.08's........ I did change out the rear gear ratio from 3.08's to 3.70's but haven't gotten on it (breaking in the gears)
Any comments here? I sure would appreciate it....
Thank you,
Bob Turner
1974 Corvette 454, Richmond six speed, 3.70's