having some issues with my car

[clemem61]

Ok to start my name is Mike i have a 88 tbird 2.3 turbo. Megasquirt1 3.0 to start i have full 3 inch straight pipe off the turbo, external wg (38mm) custom into the stock turbo manifold which is mildly ported along with the head bowl porting, hd valve springs ranger cam with roller rockers, precision sc61 turbo, gutted upper intake and knifed lower 96lb injectors aerometer afpr walbro 255 hp fmi kit (2.5inch pipe) msd 6a.. and i think thats about it anyway the car ran way harder with the old stock t3 48 turbo since then it hasnt been that fast at all the boost is at 23psi and timing is at 30 up top but still nothing my afr r 11.9-11.5-6 still dont understand wats going on i have no boost leaks plugs and wires r fresh it just doesnt move it sounds like its doing something but doesnt go anywhere like it did with the stock turbo. I ran a 8.7 in the eighth mile i dont get it now ill be lucky to get a 9.00 out of it...

[jsmcortina]

Have you re-dynoed the car since the turbo swap?

James

[clemem61]

To be honest with u I didn't even dyno it with the first turbo but I can tell there is a power loss is not as fast as it was. However I do plan on dyne tuning it went its worth it but right now if be laughed at honestly I can't see it beating a 5.0 fox lol

[jsmcortina]

Although dyno time isn't cheap, it can be a a lot faster and cheaper then many visits to the track. With a reasonable operator you can also learn a ton about your turbo setup. Be sure to find a dyno and operator that does understand EFI and turbo tuning.

James

[clemem61]

heres an msq

2011-10-26_21.08.45.new hit.msq

[clemem61]

It was suggested by someone my accell enrichments is off or not dialed in correctly I just need help with wat the problem is and how to fix it. hopefully there is a 2.3 guy in here that knows wats going on and take a look at my msq.

[Matt Cramer]

An MSQ does not work in a vacuum - a problem with loss of power revolves around how well your tune matches your engine. An MSQ that is right for one turbo may not provide the right fueling and timing for a different turbo - in fact, this appears to be the case here. If the problem is generally less power, you probably need to go back to the dyno. If there is some specific sort of issue, like a hiccup at 2500 RPM or a feeling like it's hitting a rev limiter too early, please provide more details and a data log of the problem happening.

[clemem61]

I've pretty got the tune down to not be lean and not have any hiccups but its still not fast I've been tuning with this turbo for about a year now and got it as close as possible but like I said it has to be the enrichment and idk how to mess with that...

[HidRo]

Well, sometimes, the butt dyno breaks...
I know that when I had a small turbo in my car, a k04-023 from an Audi S3, the car seemed to run really good.
I then installed a Garrett 50trim, AR.63 and it seemed the car was not going faster. It felt slower even!
Then I tested with a friend of mine, on a closed course, and guess what. I just kept on going away. The car was really faster, even though it was on a lower boost pressure.
So, could be this that you are facing, if you do not have dyno sheets to compare with.

[dontz125]

There is a 'horsepower' function in MegaLogViewer, you know. The weight / gearing / etc values you enter don't even need to be remotely accurate; you aren't trying to measure real horsepower, just if the current set-up change offers an improvement over the previous set.

[Matt Cramer]

I've pretty got the tune down to not be lean and not have any hiccups but its still not fast I've been tuning with this turbo for about a year now and got it as close as possible but like I said it has to be the enrichment and idk how to mess with that...

If it's the enrichment, that would manifest itself as either a huge bog when you floor it or random rich / lean spikes with abrupt changes in pulse width. Is this in fact the case?