Some FI questions
Thread Starter
TECH Enthusiast
Joined: Nov 2001
Posts: 650
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From: Toronto, Canada
Some FI questions I have some questions regarding single turbos. This is for a friend of course <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
Here is what he is thinking
415 CID re-sleeved block 4" stroke, 4.060 bore (thicker wall thickness), 9:1 compression with 7-9 lbs of boost. The car has big injectors and a dual fuel pump currently. Car is a 6 spd with Moser 12 bolt, Chrome-moly driveshaft and fully built T56.
With this low compression set-up NA, the car makes about 450 rwhp. I was wondering what kind of power this set-up could make with 7-9 lbs? Can these turbos be programmed for variable boost without multiple PCM programs? It would be great to be able to turn down the power for daily driving.
I am assuming an easy 700+ rwhp and quite likely running at the very edge of streetable with those kind of power levels. Variable boost could compensate for streetability
Other questions
What rear gear ratio should it run? currently 3.73
What does the turbo kit weigh?
Car is lowered, how low does the plumbing hang under the bottom?
Are there any special cooling issues for the motor?
Any comments or suggestions would be greatly appreciated. My friend would like to get this right <img border="0" alt="[devil]" title="" src="graemlins/gr_devil.gif" />
Paul
Here is what he is thinking
415 CID re-sleeved block 4" stroke, 4.060 bore (thicker wall thickness), 9:1 compression with 7-9 lbs of boost. The car has big injectors and a dual fuel pump currently. Car is a 6 spd with Moser 12 bolt, Chrome-moly driveshaft and fully built T56.
With this low compression set-up NA, the car makes about 450 rwhp. I was wondering what kind of power this set-up could make with 7-9 lbs? Can these turbos be programmed for variable boost without multiple PCM programs? It would be great to be able to turn down the power for daily driving.
I am assuming an easy 700+ rwhp and quite likely running at the very edge of streetable with those kind of power levels. Variable boost could compensate for streetability
Other questions
What rear gear ratio should it run? currently 3.73
What does the turbo kit weigh?
Car is lowered, how low does the plumbing hang under the bottom?
Are there any special cooling issues for the motor?
Any comments or suggestions would be greatly appreciated. My friend would like to get this right <img border="0" alt="[devil]" title="" src="graemlins/gr_devil.gif" />
Paul
Launching!
Joined: Nov 2001
Posts: 215
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From: Marlboro, NY
Re: Some FI questions Without multiple programs, your best bet would be to tune it with the highest boost level and lowest octane you will expect. That way you will be less likely to blow it up. The power may be low with low boost, but you can always turn it up <img border="0" alt="[devil]" title="" src="graemlins/gr_devil.gif" />
TECH Fanatic
Joined: Nov 2001
Posts: 1,190
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From: Las Cruces, NM
Re: Some FI questions The pcm does not know you are in boost, so like stated you will have to tune conservatively or get an aftermarket computer or add on computer. I have an addon computer from Incon as part of my kit that knows how much boost you have and drops timing and adds fuel to match what ever you setup.
Gary
Gary
