Hi guys, hopefully this is in the right area- Here's my situation, I got an 88 formula 350 that I've been resurrecting over the last year or so. A few months ago the intake gasket started to leak so I went to tearing it down to replace the gasket. After getting the old intake cleaned up and ready to go back on I found an area where the coolant had actually eaten through the aluminum on the rear of the manifold so I got an Accel stamped tpi base a friend had leftover- it had obviously larger runners than stock. Also the factory runners had some dents so I got the steel ***** to straighten and expand the runners from McMaster carr. On top of this I replaced the y pipe, cat, and catback with the Magnaflow setup. Will these changes throw the car far enough out of whack to need a retune? The car hasn't been fired at all with the new parts- at the moment I'm dealing with replacing the injectors and the "new" set that came with the car is like 8mm shorter than the stock ones so I'm assuming these are not correct- and can't decide on whether to get the 22 or 24 lb or larger injectors from south bay. If I have to reprogram anyways would it be better to get the 24lb so I have room to improve? I'm looking to upgrade the engine this winter if all goes well.

Thanks for any advice you guys can share.

 

Being a MAF set up the runners and exhaust probably won't require any tuning. Upping the injector flow will.

RBob.

 

Thanks for the help, I'll stick with the 22lb for now then. Can the flow to these be increased later with an adjustable pressure regulator, or will I just have to eat the cost when I upgrade the engine?

 

It’s safe to say the 22#hr can support 300hp.
Eat the cost ? Injectors from southbay fuel injectors are very reasonable.
http://www.megamanual.com/v22manual/minj.htm

 

I was looking to build 400+, and wasn't suggesting they were high, I would just rather buy them once. If I put this other engine together obviously the 22lb will not make the cut and i will have to buy a larger set. I planned on reprogramming then and hoped I could up the flow with a higher fuel pressure to save buying another set.