[78w72]

i went with 1/2" & -8 lines from tank to pump & pump to carb, 1/2" robbmc pickup in the tank, robbmc mech pump, runs great everywhere but with a good launch on a hard run it will starve out at about 1/2 track. not sure on the 1/8 time/mph but will check my slips, 60ft isnt the best either since i have to launch basically off idle & roll into the throttle or tires break free too much. i will go in tank electric if i cant get the mech set up to work better.

[Skip Fix]

The Wilwood D52 also being dual piston are supposed to put more even pressure on the pad to grip better. D614 '96 Caprice/Impala SS pads are slightly larger and fit the d52 CALIPERS.

[JLMounce]

Originally Posted by Skip Fix

The Wilwood D52 also being dual piston are supposed to put more even pressure on the pad to grip better. D614 '96 Caprice/Impala SS pads are slightly larger and fit the d52 CALIPERS.

Beyond that, the trailing piston is actually smaller than the leading piston. This will actually create more pressure on the aft piston which helps with pad taper.

That’s why the Wilwood d52 has slightly less total piston area. Both pistons are a full 2”.

The whole design is quite a bit better that the oem caliper it is designed to replace.

[prostreet64]

Originally Posted by 78w72

i went with 1/2" & -8 lines from tank to pump & pump to carb, 1/2" robbmc pickup in the tank, robbmc mech pump, runs great everywhere but with a good launch on a hard run it will starve out at about 1/2 track. not sure on the 1/8 time/mph but will check my slips, 60ft isnt the best either since i have to launch basically off idle & roll into the throttle or tires break free too much. i will go in tank electric if i cant get the mech set up to work better.

Yea, with the Q-jet the volume of fuel has to be constant to keep the bowl full. On both of our cars we have added a sump to the stock tank, and an electric pump mounted near the sump. Do you run with a full tank to make sure the pickup is not uncovered on a hard launch? That is why we went to a sump to avoid that issue. Sounds like your car is capable of better e.t.s if you get these things sorted out. What tires are you running and do you have any traction bars?

[Scarebird]

1LE front rotors (11-7/8") and S10 rear rotors with Citation front calipers (2-1/4" bore); all with Hawk HPS pads. 3 hot laps of Sandia Raceways needed a bootfull of pedal (manual)and blued the rotors a bit but still held up. 3,350 pound Trans Am.

[78w72]

Originally Posted by prostreet64

Yea, with the Q-jet the volume of fuel has to be constant to keep the bowl full. On both of our cars we have added a sump to the stock tank, and an electric pump mounted near the sump. Do you run with a full tank to make sure the pickup is not uncovered on a hard launch? That is why we went to a sump to avoid that issue. Sounds like your car is capable of better e.t.s if you get these things sorted out. What tires are you running and do you have any traction bars?

im aware of the q-jet bowl limitations but wanted to stick with a stock carb/intake due to limited hood clearance with a formula hood & that its mostly a street car so wanted good MPG & easy linkage set up. plus the expertise of cliff to set it up right for the motor instead of experimenting with doing it myself.

i debated on doing a sump but decided on the robbmc pickup, i ran full tank the first few times at the track but found i can go as low as 5/8 to 3/4 with no difference, the starvation will happen on full tank just as much as barely over half so i dont think its tank level related.

first time out on a shake down run day with a edelbrock pump & worn out BFG drag radials that were terrible it did 12.1, changed to the robbmc pump & new M/T drag radials it does 11.4 with ease, 11.3 on a good run, best is a high 11.2, will have to check the time slips for 60ft & 1/8 mile numbers.

it has a full PTFB suspension that isnt the best for launches, no real weight transfer but it handles great on twisty roads, when i get some 17-18" wheels i might try some entry level auto-x. no traction aids, running 3.23 in a beefed up 10 bolt, TCI th400 with continental converter. im more than happy with the times & how it runs, just need to decide if i want to spend more money to go faster or keep it like it is as a low 11 sec street car.

but the pads & rotors are a huge improvement over stock

[ta man]

Originally Posted by prostreet64

Yea, with the Q-jet the volume of fuel has to be constant to keep the bowl full. On both of our cars we have added a sump to the stock tank, and an electric pump mounted near the sump. Do you run with a full tank to make sure the pickup is not uncovered on a hard launch? That is why we went to a sump to avoid that issue. Sounds like your car is capable of better e.t.s if you get these things sorted out. What tires are you running and do you have any traction bars?

With my car minimum half a tank at the track not to uncover pickup. So far I'm getting away with no sump and a Robb Mc 1/2 inch pickup.

[prostreet64]

78w72, your car is running real strong given the limitations that you are trying to work within to keep the street manners. Good luck with future upgrades.