Carb Selection for a Tunnel Ram on a 632 BBC - Team Camaro Tech
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post #1 of 1 (permalink) Old Feb 28th, 10, 02:04 PM Thread Starter
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Chris
 
Join Date: Sep 2006
Location: Melbourne Australia
Posts: 235
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Carb Selection for a Tunnel Ram on a 632 BBC

I have a crate motor that came with a 1050 Dominator on a dual plane manifold

I want dual carbs...yes for the look, but my car is as much show car as it will be driver

For registration I need to keep everything real low. So I bought an Edelbrock C-66 dual quad manifold and twin 600's

Everyone telling me the engine will starve with these

I've done lots of research and I am no expert when it comes to dual carb setups, only ever had single carb engines before now

First off been told dump the Ede's as to hard to tune,
secondly they are too small,
thirdly the C-66 manifold is low rise and with such short runners, while I will have incredible low end torque (not that I need anymore with 632 cubes) I will significantly impact my top end speed (not that the car will be raced in it's first 2 years anyway)

So my plan was to go blown / injected. But I just can't afford that right now...so that's long term plan

For rego I'll just drop the 1050 back on

Here is the current plan.

Sheet manifold tunnel ram. Runners not too long but not too short...almost a street ram.

Now the tough question. I'm probably going to buy Demon carbs.

King's have a Holley 4500 flange, Mighty's and Race Demons both have Holley 4150 flange.

Kings start at 1050 CFM, Mighty's and Race top out at 1000 CFM

My question is what size twin carbs should I run, I am thinking 1000 CFM TR Race Demons.

I've been told too smaller carbs give better velocity on a TR, but also heard two big carbs are needed to feed such a big motor

Specs:
Cam 220 degrees
TH400 with 3000 stall
3.55 gears
29.5" tyre

I know I will need to play with advance and retard on the motor to tune in idle and max power.

Thanks so much in advance guys for your advice

Chris
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