Is the Apexi GT spec core big enough for a GT42R 20B?

 

How much power you're looking to make?
Although some may balk at that question, it's a very general idea of how much airflow you're trying to push through the motor.
I'd worry if you're trying to make over 500hp through that IC core...


-Ted

 

700-800 max

what size core/inlet/outlet would you reccommend?

 

Theoretically there is all this stuff and i am shure there is a formula that will tell you tha excact size ,given you know the core efficiancy and all .
But i have to say for around 800 HP , go as big as you can physically can (this is air to air right?) and i would use 3 1/2 inch piping
There might be some slight lag but i think the torque from the 20B will more then make up for it

 

Precision AS1026 31.50" 10.30" 3.50" 750hp 2.75" $500 at Titan
or
Greddy 4 row HG 25R Core for quite a bit more.

 

i bougt a 4 inch thick i/c on ebay for $127 . brand new from ss chrome. and the quality is excellent!!!!

you can't beat that.

 

will these fit?

i think the GT core is pretty large but nothing like the big greddys. it is 4in thick.

 

i know the precision fits, its what i run, greddy should fit no prob.

 

You could buy mine that I used on a T-76 20B project. Worked very well

https://www.rx7club.com/forum/showthread.php?t=633641