bogus wrote:
E85 is an octane bump from hell, really...

I would think these could work up to about 700hp... I haven't heard of any issues... The factory rails can hold some serious power, too...

Remember, make the rails bigger, need more fuel pump - pressure and volume.

You would also want to upgrade the entire system to support the greater flow rate. If you do a 5/8" rail, you would want at least a 1/2" line, and enough pump to keep up.

bogus wrote:
varies with throttle position. In general, it will drop into OD at about 25mph under light throttle.

rklessdriver wrote:
For whatever reason, some C4's are bad about the fuel slosh and some are not.

My 92 is terrible.... if I have less than 1/2 a tank it will cut out on launch at the drag strip... it's the same in hard corners.

I'd suggest you try to make an internal fuel sump of some kind first.... lots of people have used plastic liter bottles around the fuel pump to solve this problem.... I just have never got around to it on my 92.

I hate to link anybody to the SOB's that run CF but the old posters there did have some good knowlege. Here is a thread that has some links to pics (post #20 and #21) and a write up (post #11) of how people use a liter plastic bottle around the pump to make a bigger fuel sump.

http://forums.corvetteforum.com/c4-te ... ers-on-hard-throttle.html

Another option. The way the stock tank is shaped it's perfect for one of those weld on fuel pick up sumps like Competition Engineering mfgrs.

http://www.summitracing.com/parts/cee ... Lrh_tTtjrgCFWIV7AodQBAALQ

This would make running an external pump easy and it's inexpensive.

Your other option would be a fuel cell. 22 gallon is what we run in our late models. These have a rubber bladder, plastic outer shell with a 2 pc metal can to mount them. -8AN pick up tube. Very easy to make up a mounting system (2 bars across the impact sub frame is how I have one mounted on my 84 drag car) in the back of a C4 Corvette. Even with fabricating the mounting bars you'd be about $300-$350 turn key.

http://daymotorsports.com/proddisp.ph ... +bladder.+%0A%95+Cells+ha

Will

BillH wrote:
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383tpimachine wrote:
Depends on how many runs I PLAN to do. Usually try to keep it a half tank or less.

Another reason I am going to a cell/custom tank is for a sump to use an external fuel pump.

My stock one has a leak somewhere and I can smell gas. Been this way for a few years and like everything I upgrade when I replace.

Probably your pump, pickup, etc.
But that's a reason not to go to a cell especially with the external pump thing.

If you can get the measurements where the stock tank is, I'd bet ATI has something in the catalog that would be close. I see a lot of different ones at the track.

Matatk wrote:
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383tpimachine wrote:
Circle D have done me NO wrong and have great customer service.

Typo?

Matatk wrote:
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383tpimachine wrote:
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Matatk wrote:
Thanks for clearing that up. I should have picked up the fact he said 84-88....brake adapters would be 84-87 and 88-96.

Actually 84-88, 89-91, and 92-96
He has V1 done and a good start on V3 but doesnt have a V2 yet due to him not having a stock one to copy but is working on it

Pedals may be 84-88, 89-91, and 92-96...

but brake adapters as I stated above are 84-87 and 88-96.

Matatk wrote:
Thanks for clearing that up. I should have picked up the fact he said 84-88....brake adapters would be 84-87 and 88-96.

rayquayle wrote:
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Matatk wrote:
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383tpimachine wrote:
Mine arrived today. Very stout piece.
Mine is the V1 for 84-88

Pedal bracket or brake adapters?

I'm sure he means pedal bracket, Matt. I got mine on Tuesday.

djxib wrote:
I'd like to upgrade my fans (same issue - denser 3-core radiator that cools instantly above 30mph but in traffic my fans are hopeless).

I do have an issue that the DeWitts upgrade requires the A/C dryer to be moved but my supercharger setup makes that very difficult. On my 92 the fans seem to be a direct bolt-on to the shroud, I wonder if there is a 'standard' size spal fan out there that is a simple bolt-on (and maybe wiring upgrade).