This is a little off topic, but I have major turbo lagt because of the size of my turbo. By the time my power kicks in, its time to shift. Is there anyway to reduce spool up time without reducing the size of my turbo? When I rebuild my engine and turn up the boost, will that help?

 

Nope, you need a smaller turbo. Your engine doesn't move enough air to feed that turbo. The other solution would be to build your engine to rev higher.

 

build me engine to rev higher? Will that damage the engine more? This lag is really killing me at higher gears like if I'm just crusing on forth gear, and want to accelerate, it takes a bit for my turbo to spool up and give me power. I know that if I launch from start, the first gear picks up fast.

 

Otters second option in theory would work but with the stock cams your not going to get any power in the high RPM's . You need to get a smaller turbo, it will be the easiest and quickest solution.

 

so far for me the best setup was the Turbo installed in my car T3/T4, it kicks in around 2200 rpm and drops off at about 5800 rpm and for every day driving you should be ok at 8 to 10 psi, but remember to raise you Octane level on higher boost levels to prevent detonation. there is no really set time to know when you will need a rebuild, i plan on doing one next summer or just do an Evo engine swap, still undecided....

 

boost at 2200 rpm

Traction ? hehe

 

Hey Jonathan I think I saw your car at Splitfire Performance. I guess you picked it up. What is your impression of the shop overall, and what do you think of Paul. I have a 06 Eclipse GS and am planning on turboing with them. He already did the RRE pulley for me. The price he gave me was pretty good.

 

Honestly, I think splitfire is great. They do things a big extreme though, because I asked for a GT20, but he dumped in a GT35 because he said it looked a little small, but their prices are really good, and the work they do is great. The prices that they gave me was good too. That's why I go back to them all the time.

 

You could use a Bigger turbo but it needs to have lightweight ceramic impellers or scrolls and a ceramic ball bearing that will reduce turbo lag a LOT but such turbo will cost a LOT maybe 1500+ you should go with a hybrid or a small T4 size there are guides about how much flow your engine will produce and you can use the turbiune maps to obtain the perfect size.

 

I was just wondering, I see a lot of other cars using massive turbos, like skylines, evos, etc..., do they suffer turbo lag too, or is it just because the ralliarts engine isn't as good as those cars?

 

I would be looking at a turbo cam this will at least give you more rpms before you have to shift as it will keep the valves open for longer... depending on your ecu that you are using you could also adjust the switch over point on MIVEC so instead of it happening at 3700rpm have it come in at 3000rpm but the downside is that you will use more fuel

But stepping down to a smaller turbo would be the way to gofor the short term till you rebuild the engine with better pistons and better cam and possibly lower the compression

 

Just type GT35R lag problems in the search you will see that the evo guys have lag also with that turbo I also notice most guys running the GT35R are pushing near 30 psi

 

30 psi...

... which means they are going to already have allowed some lag in their heads because you have to sacrifice somewhere to push 30psi(usually the wallet first)

 

Well, it's good to see that the EVOs are suffering lag a little. Makes me not feel so bad. =)