there was a guy in columbus whos apex seal went, shot out and killed his cat. LEast thats what the story on one of the local racing boards told. i wasnt there but i think it was real.

 

Cat as in meow, or cat as in converter?

 

I have a t 70 with a .96 A/R right now. Its a p-trim turbine wheel. I was gonna sell it with the motor. I would like to do a garrett ballbearing turbo. I'd save up the extra money for one of those. what would be a good garrett equivilant for something around a t 70 or so?

 

I cant get the garrett site to open up the list of compressor maps. Im not the best in the world at reading them anyway so any advice will be much appreciated.

 

dunno if you have a motor for the swap yet but i have a complete ls1 drop out motor for sale.
pm me if interested in it

brook

 

John, there is an air consumtion chart somewhere for a stock LS1 -- if you plan on using the stock heads/cam, we can look at it and try to size a turbo. I'm sure these guys will be able to chime in as well.

 

thanks, I appreciate all the help I can get.

 

I would stick n/a until you can afford forged internals. There is a ton of fabrication involved and you may run into cooling problems. If you have a horizontally mounted Koyo/Fluidyne radiator and vertically mounted intercooler that should provide enuf cooling.... but since it has only been done a few times and no real information shared aside from performance keep this in mind

I make 440rwhp with 91 octane and have retained the excellent handling. It should go 128mph in the 1/4 n/a and 140mph+ on nitrous.

If you plan to drag race and limit yourself to 500rwhp and built another forged block as a backup plan your turbo plan would be a good setup. Be aware you will be pretty much tractionless in 1-3rd gear. 3:90 auto gears out back may help a little... but in reality you need a 3:07 or 3:27 gear out back meaning a custom rear end isntalled. (Viper or Cobra Mustang)

Torquecentral.com has a V8RX7 section FYI. I would use the search feature on there for a few hours as there a few guys building creations such as what you intend. A stock LS1 block/crank with $350 Eagle rods, good forged pistons $600, stock main caps should be good for 750rwhp+ with proper tuning. Obviously lower compression is a must. Boost equals power... better octane gas and more timing will yield more power just like in any forced induction setup.

With custom offset rims you can fit a 285/30/18 up front BTW.

500rwhp rotary vs. a 500rwhp LS1 will get its *** handed to it. They are very different cars. A 430rwhp LS1/FD will run high 10's with traction n/a. A 100-150hp nitrous shot should put you in the 9's. A T76/LS1 could certainly go low 10's and 9's if not faster at full tilt.

Good luck,

-Mark

 

thanks for the input. I was unaware that the car would be that fast with 440rwhp. That is very impressive.

I am not just building a car for the drag strip though. I want to build a fun fast reliable car. I will drag race it some, but it will mainly be a street car.

I will have to keep the ls1 stock for a while anyway because being in college I don't have the funds to do much more than getting the ls1 in the car by itself. by the end of next summer I should be able to turbocharge it. I am really set on the turbo too. I love the way it feels and sounds. everyone knows to back off when the hear the whoosh! (not to sound like a ricer).

that said, for now my goal will be 500whp. I have read about alot of people with that on the stock bottom end. The reason I set a 500whp bench mark is to keep myself from spending more money than I have.

I have been on the torquecentral forum as well, and have found alot of great info from them.

I don't really know what 500whp will do to me. I will have to get there gradually so I dont kill myself. Im only 19 and I havent really driven that many high-horsepower cars. Brysons 400whp fiero and my rx7 are probably the fastest I've been wide open in. I just want to reach this safely.

thanks again for the great info, and sorry about the length of the post

-John