:::RHMT::: Real Home Made Turbo
General Category => Forced Induction => Topic started by: MAJORAHOLE on April 22, 2010, 12:57:06 PM
-
my spool time is shitty, z6, ebay 16g, 9psi @ 5000rpm
my tune is rich in boost, maybe just getting into pressure too
i might have an exhaust leak, but i know its not before the turbo(ive checked a few times)
im pretty sure theres no boost leaks either.
so could a tune thats too rich during spool cause slow spool??
any other ideas welcome too.
btw, my wastegate sticks open for a second at full boost (10psi), just for a sec tho
-
retard timing as it goes into boost.
-
i'll giva that a try, gonna run some seafoam through it tonight to make sure no exhaust leaks
-
Could be the turbo. Could be an exhaust leak. Could be a boost leak. Could be the tune. Those are the 4 I would start off with.
Can I ask, why buy an eBay 16g? I mean seriously, Evo8 turbos are $200.
-
i bought it last year, i never saw any evo 8 turbos for $200 then. havent looked lately
i figured if the seals or bearings go, then i could have it rebuilt with non-china internals
-
Exhaust leaking past the WG valve (no firering?) will slow spool.
Exhaust leaking into the engine bay, and into the air filter, will slow spool.
Boost leaking through a tiny hole in a charge pipe or BOV can slow spool.
An ebay turbo eating it's thrust bearing will slow spool.
There are a few other things that slow spool, but to a lesser extent. Retarding timing has little effect, at least retarding past the 'normal' amount for the corresponding boost. Regardless, 3/4 of slow spool problems stem from some sort of leak.
-
I used to tune my car to run 11:1 from 0-15 PSI boost, and spool sucked bigtime. On my setup, leaning it out to 13.5:1 at 0 PSI boost and tapering to 12:1 by 8 PSI helps spoolup and driveablity a ton. Night and day difference.
-
post turbo exhaust flow problem? You have a cat? a partially melted one will plug up the cat exit, making tons of back pressure.
Phil
-
i do have a stock cat, was thinkin about getting rid of that here soon
-
i do have a stock cat, was thinkin about getting rid of that here soon
ding ding ding. Get rid of it ASAP. Buy 2 flanges and a 2' of pipe from HD and get to it.
-
ya, i will.
im finishing our basement right now, so every time i try to do a little work on my car, my wife gets on my ass about the damn basement.
i do want to get it done though. jsut bought a new projector for it, and want to be able to watch some shit.
also she wont left me buy another xbox till its done either, fuckin bitch...
-
On my car I still have the cat, but there is no material into it so it still legal :P But I need to buy a bigger one, this one is only 2.25 I think....
My spool suck too.
-
luckily we have no emmisions testing, so it should be good
-
luckily we have no emmisions testing, so it should be good
Same thing here, they only look if the cat is there. It's like a 300$ fine if you don't have it...
-
ahh, i was thinkin about putting a cherry bomb in its place to quiet it down
-
ahh, i was thinkin about putting a cherry bomb in its place to quiet it down
hollow it out for now and see if that at least helps your problem