4g61t.org

I am going to upgrade my 61t motor with 450cc injectors and 1g Maf. I did this before, though can't remember if I needed to swap out the fuel pressure regulator, as well, for the one from a 63t motor. Thought I heard that it was necessary, but it was ages ago now. Anyone?

_________________
Good stuff - trucks bring it!

From personal experience I didn't notice a difference. They are probably the same essentially.

_________________
89 Mirage Billet 20g 63t 12.4@120 417whp 400wtq @ English Racing.
89 Colt GT E316g
06 Silverado SS
07 ZX6R

Thanks! I understand they vary by a few psi, but besides that, would it offer better protection under boost? I swear, the stock 61t regulator is what I used before.

_________________
Good stuff - trucks bring it!

They all get you to the same place.

Use the regulator with proper corresponding pressure that your chip/ECU is set for, and nothing else.

Thanks, Tim. I will remember to swap it out with the ECU then.

_________________
Good stuff - trucks bring it!

I should mention that keydiver (DSMChips.com) performed my chip installation using 1G AWD code, 4g63t code and 37.5 PSI to match my FPR. 4g61t with 14b, 1G cams, 1G MAF/ECU/450's.

Essentially if you used a 4g63t ECU, to match the MAF and injectors AND used the FPR to match the ECU code, then you would be in business. Only thing that would be a little off from what would make the motor really wake up, is the fact that the timing would not be adjustable unless you chip it and go stand alone. A stock 4g63t ECU should work just fine, in theory, as this is how my car came; the mods listed above and a non-eprom 4g63t ecu <- again, no wideband or knock checking ability.

I'm actually at a loss for what to tell you now, because my setup was different from what you are going to be using ... 4g61t motor with 4g63t bits which I had installed once upon a time also. But i had no wideband then!

Still a fan of doing the whole 4g63t and all the corresponding parts, plug and play (but keep your 4g61t fuel rail and a few other bits), then there are no questions if it is all stock and could later be lightly modified and still fly.

I realize not everyone has the budget for complete motors in a single shot. None of us do really.

That is very true. Yeah, I plan to continue using the 61t ecu for a while and only add the 1g injectors & maf. I ran that combo in the past without issue, and was happy with the extra kick it gave the motor. Furthermore, I hear to upgrade for the 63t ecu has a lot of benefit in the way of more aggressive fuel mapping.

_________________
Good stuff - trucks bring it!

Yes, the AWD code was very aggressive. Consider a 1G Eprom, with more subtle timing curves, done by someone that knows how to tune for the turbo in question (at the time).

Double check the knock sensor to confirm the "black" goo on the backside is not slowing flowing out, or even tacky and giving the appearance of retracting, before going into the higher power levels.

Advice taken on checking the knock sensor condition. Well, I am going to toss in these 450cc's and 1g maf on the car tonight. A local called and informed me that the brake lights were cutting out on one side when I used the brake pedal. Thought I fixed this problem with the grounds on the taillights, but it appears I will spend a couple more hours with them again. :^/

_________________
Good stuff - trucks bring it!