Hey all I just read that article that drag sport did on putting a haltech with sidedraft throttle bodys on a SP 6 port engine, and instead of using 4 550cc injectors they used 2 720cc injectors, is this better for ultimate high end at the sacrafice fo some drivability? I thought this might be kewl since I would only have to buy 2 new injecotrs instead of 4.

Thanks

 

Two 720s are enough for a 13B and offer no benefits nor demand any sacrifices; you can get a 13B idling very well on 720s.

Brandon
BR7 Racing

 

So Brandonn would there be any money savings with buying 2 720's vs. 4 550's?
And would either way be harder to tune?

 

I replaced my original 460cc with 550cc. Works fine!

 

Two 720cc/min injectors are going to limit how much power you can make to ~200hp. Four 460's (stock) allow ~250hp. Using 550cc/min Turbo injectors (~300hp) is overkill unless you plan bridgeporting.
If you want to switch to a Weber-style TB, get one with four injector bungs and just use your stock (free!) injectors.

 

NZ I know that TVM(sp) doesn't won't work with our stock injectors, with RX7 injectors work with Injection Perfections TB's

 

-^-bump-^-

 

???? what are you trying to say

 

I was asking NZConvertible if he knew if Injections Perfection's TB'b (Throttle Bodies) would work with RX7 injectors or if they too required me to use Bosch injectors.
But just in case he didn't know I email injection perfection directly.

 

Sorry, not 100% sure. Check with Injection Perfection.