A9L question...

[fiveoho]

can i swap out the factory computer in my 95 GT for a A9L and get any benefits? i know the factory 94/95 computers 'bump-back' the timing between shifts....but the A9L doesnt.

i'll be doing a fresh 306 with bigger H/C/I etc....can i even use a A9L with that setup?

thanks guys

 

[HISSIN50]

You will need things like a fan controller, BAP sensor, etc. I think it is a large step backwards - spend the money you would on the swap parts toward a handheld or chip, so you can keep your superior T4 processor. It is the factory GT tune that sucks on the 5N95's, not the processor itself (you dont see cobra folks complaining about their computer - nearly identical guts but a much better tune).

Just my two cents.

Good luck.

 

[fiveoho]

You will need things like a fan controller, BAP sensor, etc. I think it is a large step backwards - spend the money you would on the swap parts toward a handheld or chip, so you can keep your superior T4 processor. It is the factory GT tune that sucks on the 5N95's, not the processor itself (you dont see cobra folks complaining about their computer - nearly identical guts but a much better tune).

Just my two cents.

Good luck.

if i bump the timing, would that help?

what else can i do?

 

[HISSIN50]

if i bump the timing, would that help?

what else can i do?

If your main issue is the tip-in retard (pulling timing between shifts), you basically have to tune that out, run locked-out timing, or powershift.

The issue IMHO with the 94-95 GT puter tune is the timing and fuel curves (remember, the 94-95 puter is load based). We (94-95 guys) get way too much timing and too little fuel at part throttle. The fact that WOT fuel trim adapts over time doesnt help either. So bumping the timing could have some serious side effects that you dont want (you want to recurve the timing tables across the board, not phase-shift them, which is what a bump does).

I gotta tell you, I have the feeling you are going to need a tune with that HCI combo you plan - more folks than not seem to need it with that change. If you are into doing stuff yourself, the TwEECer RT would be my choice. It has a rediculous learning curve (my perspective as a product before the puter generation - I dont pick things up quick). But being able to change scalars and tinker around whenever you please sure is appealing IMHO (you can maybe tell I have been considering getting one). A PMS is a more userfriendly option. or a good ol' chip (SCT, etc).

All that is neither here nor there. If you post specifics you want to change with the tune, that can be helpful in people trying to help out.

Random thoughts.

Good luck.

 

[fiveoho]

If your main issue is the tip-in retard (pulling timing between shifts), you basically have to tune that out, run locked-out timing, or powershift.

The issue IMHO with the 94-95 GT puter tune is the timing and fuel curves (remember, the 94-95 puter is load based). We (94-95 guys) get way too much timing and too little fuel at part throttle. The fact that WOT fuel trim adapts over time doesnt help either. So bumping the timing could have some serious side effects that you dont want (you want to recurve the timing tables across the board, not phase-shift them, which is what a bump does).

I gotta tell you, I have the feeling you are going to need a tune with that HCI combo you plan - more folks than not seem to need it with that change. If you are into doing stuff yourself, the TwEECer RT would be my choice. It has a rediculous learning curve (my perspective as a product before the puter generation - I dont pick things up quick). But being able to change scalars and tinker around whenever you please sure is appealing IMHO (you can maybe tell I have been considering getting one). A PMS is a more userfriendly option. or a good ol' chip (SCT, etc).

All that is neither here nor there. If you post specifics you want to change with the tune, that can be helpful in people trying to help out.

Random thoughts.

Good luck.

i appreciate all your advice. but i gotta tell you, youre over my head on alot of this, overlook my ignorance. bumping the timing just to get rid of the slug between shifts will cause problems elsewhere, right.

i have a venom 400 pcm that i picked up a while back. got it for about 1/2 of what it lists for. but venoms claims are really optimistic....25% increase? ?

ive never installed it...wondered if i just outta sell it or it try it?
but your 2 cents is: stay with what i have (factory puter) and get a tune when all done?

btw- whats a average price to get a car tuned (from a performance shop)and what all does it include


thanks again

 

[HISSIN50]

i appreciate all your advice. but i gotta tell you, youre over my head on alot of this, overlook my ignorance. bumping the timing just to get rid of the slug between shifts will cause problems elsewhere, right.

i have a venom 400 pcm that i picked up a while back. got it for about 1/2 of what it lists for. but venoms claims are really optimistic....25% increase? ?

ive never installed it...wondered if i just outta sell it or it try it?
but your 2 cents is: stay with what i have (factory puter) and get a tune when all done?

btw- whats a average price to get a car tuned (from a performance shop)and what all does it include


thanks again

The computer pulls so much timing during shifts, that bumping the timing to accomodate that feature is simply not feasible. It just needs to be turned off inside the computer. Running locked timing works OK in mild climates (I ran like that for a little while).

For a pro tune, you got me. I would check out Don 95Vert (he is a member here). He is affiliated with SCT tuning chips and is a very nice, informative guy (we swap PM's occasionally). His website (in his sig) has some info on the chips.

I dont know snot about the Venom. I would post on the 94-95 Tuning sub-forum (it's a brand new child-forum, which is at the top of the 94-95 Tech sub-forum). Those guys are really sharp and can give you more info than you ever wanted. Anything posted by Grady is golden.

Good luck.

 

[fiveoho]

The computer pulls so much timing during shifts, that bumping the timing to accomodate that feature is simply not feasible. It just needs to be turned off inside the computer. Running locked timing works OK in mild climates (I ran like that for a little while).

For a pro tune, you got me. I would check out Don 95Vert (he is a member here). He is affiliated with SCT tuning chips and is a very nice, informative guy (we swap PM's occasionally). His website (in his sig) has some info on the chips.

I dont know snot about the Venom. I would post on the 94-95 Tuning sub-forum (it's a brand new child-forum, which is at the top of the 94-95 Tech sub-forum). Those guys are really sharp and can give you more info than you ever wanted. Anything posted by Grady is golden.

Good luck.

i appreciate it

 

[Don 95Vert]

A well tuned SN95 processor is at least equal and probably much better than an A9L processor. There really isn't much of a gain to going to one. FWIW - we could do a tune that would almost perfectly mimic an A9L with your processor - basically lock the load part of the spark calculation out and make WOT spark based on RPM alone. The tip-in retard can be gone with 2 keystrokes - but with if you completely remove it, you may get a little tip-in ping. Nothing serious, but it'd be there. On my old Kenne Bell combo, I actually added a little more to get rid of the ping - It didn't hurt a thing at the track - mainly because I was stupid and powershifted. It's not pretty what 450# of torque do to a stock T5 after 30-40 powershifts....

I'd be careful with Venom's claims but other than that - I've never heard of them. 25% gains with a chip or computer swap, just ain't gonna happen.