total NOOB
#1
total NOOB
Ok well here is the deal I just got a 1990 Turbo Miata with the Greddy kit. I know nothing about miata's. All I have owned was VW's the miata is gonna be my new track/auto x'er. I have alot of ? but for right now i am gonna ask my main one. Why the hell does this car have such a bad turbo lag problem. It doesnt hit full boost(10 PSI) unit 4400rpm.......Is this normal or what. From what I here it is either running lean or needs a new down pipe and bigger exhaust. Please help......
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#4
I think the stock one is pretty skinny like the stock Miata exhaust. Not sure what to look for to make sure, but the aftermarket ones are 2.5in.. Mine is from Racing Mazda, I think someone on this forum makes them too.
http://www.racingmazda.com/miata-exhaust.htm
http://www.racingmazda.com/miata-exhaust.htm
#9
Turbo tony makes a very quality product. He was the guy that was making the racing mazda ones, but now makes them on his own time. I will try and dig up his email address for you. There is also the new begi unit, you can get one of those and end up with a very high quality product. Just make your choice and go for it, but you need to get rid of the stock dp in order to get any real kind of spool out of that turbo.
#11
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yeah, 10psi is nothing, this engine is fairly bulletproof given a good tune.
you'll want to shoot for around 13-12:1, most people run 7-8-9* timing in boost, just listen for ping, that's the engine killer
get us a shot of the DP and we can tell oyu if it's stock or not.
also, is the "lag" you are speaking of, just between the transistion of vacuum and boost?
what other components for fuel does it have? 1.8L injectors, stock pump, and FMU is getting pushed to the limits at around 170rwhp (around 8-9psi)
you'll want to shoot for around 13-12:1, most people run 7-8-9* timing in boost, just listen for ping, that's the engine killer
get us a shot of the DP and we can tell oyu if it's stock or not.
also, is the "lag" you are speaking of, just between the transistion of vacuum and boost?
what other components for fuel does it have? 1.8L injectors, stock pump, and FMU is getting pushed to the limits at around 170rwhp (around 8-9psi)
#12
DP looks stock, it's tiny and black in the engine bay pic. Easy way you can tell yourself is if where the pipe meets the flange, if there is no bellmouth it's stock.
I second Brain's comment, 10 psi is absolutely safe. FYI the Miata's engine was originally a turbo engine in the 323 GTX, so internally it's ok for turbo.
I second Brain's comment, 10 psi is absolutely safe. FYI the Miata's engine was originally a turbo engine in the 323 GTX, so internally it's ok for turbo.