need twin turbo suggestions

[BLACK MAGIC RACING]

So i've decided to go twin turbo on my s2 headed 274. What sizes have guys run and been successful with? my car's got some weight to it (2900 with me in it) I want to run solid, consistent mid 8's or better. Car is backhalfed with 15"x32.5" tires, so traction isn't a problem. Any suggestions and theories would be greatly appreciated!

Freddy

 

[Nick Micale]

In a 3100# GN we ran twin 67's to get low 8's, and this was with a 210 cu.in. stage engine.

 

[SGRIM]

Get two 67's and don't be worried about upgrading later...

All other things assumed nice at that weight, anything like a pair of 49's or bigger should get you in the 8's...

 

[BLACK MAGIC RACING]

Thanks fellas, great info!

Let me ask you something else, what would be the easiest way to modify my RJC megacooler for twins?

 

[SGRIM]

Thanks fellas, great info!

Let me ask you something else, what would be the easiest way to modify my RJC megacooler for twins?

You just need new tubing, the I/C itself doesn't need anything.

 

[BLACK MAGIC RACING]

Shane, where would i merge the 2 turbo outlets?

 

[SGRIM]

Shane, where would i merge the 2 turbo outlets?

I can't believe I can't find a pic for you right now, I will keep looking but basically you want the two tubes to merge before the I/C inlet. I am sure someone will find a pic, if not I will later!

 

[BLACK MAGIC RACING]

Any luck?

 

[KendallF]

I don't know exactly what your IC end tank looks like, but it might be easier to cut the end and make it a dual inlet. I did this with an old CAS unit; here's a pic:

 

[turbobuick]

I would build a crossover and run the turbo you have for sale. Might even go faster:biggrin:

 

[SGRIM]

I have them somewhere just can't find them yet... Sorry...

 

[BLACK MAGIC RACING]

Yeah Chris, that's another option, 'just keepin all avenues open! :biggrin:

Thanks Shane, no real rush, didn't get the bullet back yet anyway

 

[BLACK MAGIC RACING]

Kendall, looks like you have some dawson headers too?

 

[sweetv6]

Hi Freddy

there is the y pipe stephane and i built for twin 540 cid

claude

 

[KendallF]

Kendall, looks like you have some dawson headers too?

Yeah, those were the "Hooker" headers that apparently Dawson built on the side. I sold those some years ago.

 

[SGRIM]

Jay had several sets of Dawsons made for us. Quality