Shawn Wrote
Its just kinda weird that you can run 30# injectors without idle problems, yet when I had LT1 injectors (24#), it ran so rich that it barely even ran at all.

It?s probably due to your cam. Low vacuum=rich mixture. When I had cam?s in mine  it always ran rich but never to the point it wouldn?t run. When it was cold it was unbearable, that?s why the heated O2 sensor. It would just heat up a lot faster and get it leaned out some.

I ran 4 different sizes of injectors with cams. The bigger the cam got the worse the richness got. They weren?t built for 10# of vacuum.

With the roller cam (stock ) good vacuum I have used 3 size injectors, 26, 30, and 42#.
Idle is fine and no sign of richness. Even the 42# worked fine until I hit WOT and then it just bogged. Couldn?t burn that much fuel.

So if you guys can?t run bigger injectors I don?t have the answers for you. One thing to keep in mind is if you can?t burn the fuel you won?t go anywhere. With the stock turbo
I don?t think a injector over 24# is viable. Just my opinion they just don?t pump enough air to utilize much larger injectors. I did run 26# injectors once with the stock turbo and it didn?t go fast, ran fine and idled good.


RareGMFan wrote
Ok, that being said, were you the one that also had the RRFPR? If so, do you think that played any kind of roll in making the 30# injectors work without a problem.

Yes. It played a role but you have to remember I am pumping probably 3 times the air that a stock turbo pumps and it?s a lot cooler air. In another words don?t get 30# injectors unless you figure out a way to burn all that fuel.

If you just want a little faster ride and don?t want to go the turbo and the support stuff it takes just get Jeff?s TG chip. Its cheaper by a bunch, safe(I have melted 3 pistons and bent one rod)and takes less that 15 minutes to install.

Hope this help?s.

I will post Anatomy of a 13* TGP under performance later this afternoon and you can see what I have done. I started writing this after guys asked what I did to get to 13*. Got to look it over so I am not lying. :lol:  I am always changing something.

Jud

I apologize for jumping in here with this question but I am having a bit of a problem myself with idle and richness.. I am running the Crane 2020 cam, a very mild cam upgrade that was recommended to me.  I am only getting about 220-240 miles per full tank of gas.  And it will not idle down after revved.  Does this sound something more like a vacuum leak or something that the cam is doing?

Quote from: sleeperred90tgpShawn Wrote
Its just kinda weird that you can run 30# injectors without idle problems, yet when I had LT1 injectors (24#), it ran so rich that it barely even ran at all.

It?s probably due to your cam. Low vacuum=rich mixture. When I had cam?s in mine  it always ran rich but never to the point it wouldn?t run. When it was cold it was unbearable, that?s why the heated O2 sensor. It would just heat up a lot faster and get it leaned out some.

I ran 4 different sizes of injectors with cams. The bigger the cam got the worse the richness got. They weren?t built for 10# of vacuum.

With the roller cam (stock ) good vacuum I have used 3 size injectors, 26, 30, and 42#.
Idle is fine and no sign of richness. Even the 42# worked fine until I hit WOT and then it just bogged. Couldn?t burn that much fuel.

So if you guys can?t run bigger injectors I don?t have the answers for you. One thing to keep in mind is if you can?t burn the fuel you won?t go anywhere. With the stock turbo
I don?t think a injector over 24# is viable. Just my opinion they just don?t pump enough air to utilize much larger injectors. I did run 26# injectors once with the stock turbo and it didn?t go fast, ran fine and idled good.


Jud

The thing is, I have more vacuum with this cam then I did with the stock one. (which makes sense because it does have a wider lobe sep.) I have 21 in. of vacuum at idle, with the stock cam it was around 18-19.  The car was rich at idle and got richer as the revs went up.  At WOT it would bog down a lot and black smoke would POUR out the back.  Even when the car was fully warmed up it still ran really rich.   It doesn't seem like going from 22-24lb. would make much difference.  I'm thinking about getting a RRFPR and keeping my stock injectors because I just can't get it to idle with bigger ones.

Shawn