Disappointing ET's with 408
Well, I have my 408 togehter and running, and have had it to the strip twice now, with disappointing results, best ET of 13.4. See results below - track not running 1/4 due to fog, so 1/4 time is projected. All siad, I have about $6000 in the entire motor.
Motor details:
408 cast crank stroker from Hughes
9.9:1 compression
93 Octane gas
mild port/polish on Edelnbrock al perf heads, closed chamber, fresh valve job
M1 single plane airgap with gasket match (heads too)
Edel 1406 600 cfm carb, vacuum secondaries
Comp roller .544/.541 236/242 110 centerline
FBO ignition, ditributor curved to 16 inital, 34 total @ 2900 rpm
Hooker comp 1 5/8" headers (dented bottoms on driver side, naturally) 3" collector
2.5" pipe to flowmasters into 2" pipe (looks to be OE) into a-body tips
3000 stall TCI streetmaster
727 manual reverse
4.11 sure grip 8.25"
Questions:
I have a Carter 750 mech sec and a holley 750 dbl pump with proform body that I want to test. Expected dif in ET?
Would it be worth reworking the exaust ($600) to 3" tti's, estimated ET?
WHat about TTI headers? I saw a Westtech dyon showing +10 hp over the hookers above 4500 rpm. ET diff?
I read about other similar setup getting mid to high 11's, and I ain't nowhere near that.
Other suggestions?
Well, I have my 408 togehter and running, and have had it to the strip twice now, with disappointing results, best ET of 13.4. See results below - track not running 1/4 due to fog, so 1/4 time is projected. All siad, I have about $6000 in the entire motor.
Motor details:
408 cast crank stroker from Hughes
9.9:1 compression
93 Octane gas
mild port/polish on Edelnbrock al perf heads, closed chamber, fresh valve job
M1 single plane airgap with gasket match (heads too)
Edel 1406 600 cfm carb, vacuum secondaries
Comp roller .544/.541 236/242 110 centerline
FBO ignition, ditributor curved to 16 inital, 34 total @ 2900 rpm
Hooker comp 1 5/8" headers (dented bottoms on driver side, naturally) 3" collector
2.5" pipe to flowmasters into 2" pipe (looks to be OE) into a-body tips
3000 stall TCI streetmaster
727 manual reverse
4.11 sure grip 8.25"
Questions:
I have a Carter 750 mech sec and a holley 750 dbl pump with proform body that I want to test. Expected dif in ET?
Would it be worth reworking the exaust ($600) to 3" tti's, estimated ET?
WHat about TTI headers? I saw a Westtech dyon showing +10 hp over the hookers above 4500 rpm. ET diff?
I read about other similar setup getting mid to high 11's, and I ain't nowhere near that.
Other suggestions?