ATP
http://atpturbo.com/root/releases/release052704.htm

Vishnu
http://www.vishnutuning.com/evo_Stage2_v500.htm

Buschur
http://www.buschurracing.com/cgi-bin....cgi?27X376545


I have done tons of research over the past few months trying to decide whats the best bolt on gt30 (gt3071 or gt3076)

I have been waiting to see how the Buschur 20g pans out but i from what hes saying its not ideal for roadracing and thats what my car is being slowly built for.


From people with first hand experience.....

Whats kit offfers the best spool..... best power... and over all best kit for road racing??

Thank you for your input!!!
jbfoco

 

ATP

I wonder how many other kits out there are actually supplied by ATP...

 

I am partial to my ATP. I have the gt3071r...very streetable and like stock spool! I want a 35r, but for driving over 60 miles a day as my daily driver...the gt3071r from ATP is not only cost effective, but perfect IMO for daily use/road racing...all IMO of course

 

ATP is going the be the worst kit of the bunch, as far as performance goes. But i dunno if that arguement would hold up on bang for buck talk.

Its CHEAP, after you add injectors its 1k cheaper than the vishnu kit, which is amazing from what ive heard. I haven't heard anything about buschur's kit, my only problem with his is i don't know if it will bolt to the stock intercooler and stock-style downpipe.

 

from what I have read people who dont have ATP kits will tell you it sucks. But people who have the kit all seem to like it

 

Not all of them. I have the atp3071R, and I should have spent more for a better kit. Don't get me wrong, I am not bashing what I bought, but I should have done something else. I am now thinking of scrapping this and going with an ams or rnr kit with a bigger turbo. The lag on my atp kit would probably be somewhat similar to a better built 3076 or 50/60 trim kit.

If money is the concern, buy an atp3071R. Or you can buy mine

 

its the same deal with hks 280's...

 

RnR GT3076R great kit and build quality.

 

...

 

The ATP is Garbash for one Reason and one reason only. The custom hotside to fit up to the stock Exhaust manifold. It simply does not flow right. It makes a 3071 spool almost as slow as a GT35R and CHOKES the top end and does not make as much power. A proper 3071R will make 420WHP on pump and trap at 120MPH+++++++++++ easily. The ATP unit can’t even crack 400WHP and runs slower.


The Vushnu unit is VERY nice, but it costs about as much as the AMS kit so why bother without a Tubular manifold.


Buschur seems to be where it’s at, runs an unmolested GT30R AND makes a custom Cast manifold which may not flow as well as a tubular but is close and a lot more reliable and A LOT less assuming. I may buy the Buschur kit but I wana see Pump gas Dyno and Track times 1st.

 

Ok, I had an ATP and I put the Vishnu on, so what does that tell you

Both were 30R's.

Seems like the 3071 has done much better than the 30R with ATP and that's the one they push.

 

If you compare apples to apples and back out the cost of injectors, turbo inlet, and slimline - things the other kits don't offer- fan the Vishnu cost is close to $3400-3500 which is a lot less than the AMS Kit. There is also a modified engine mount which keeps stress off of the exhaust manifold - something ATP doesn't offer - as well as a bung for the SMART wideband o2 sensor in the midpipe.

The quality of Vishnu's fabrication and fitment is also superior to the ATP. Vishnu kits are hard to get because their fabricator takes excruciating pains to make sure everything fits and that takes time.

As far as the hotside is concerned, from what I've read, the ATP 3071 hotside is less of an issue than it was for the 3037s (30R).

From a quality standpoint, the Vishnu is a better made and better performing unit than the ATP and is very much a pleasure to drive.

As far as Dave's kit is concerned, I don't have any experience with it, but just looking at their site, they don't provide the IC tubes, turbo inlet pipe, dp w/ o2 housing and mid-pipe but do give you a cast manifold on their kit which may help flow on race gas.

Most likely you'll end up spending the same amount for either the Buscher or Vishnu when you do a part for part comparison. There is no magic bullet and you get what you pay for.

Jbfoco, you are in Northern California which is near Vishnu. That could work to your favor.

As an FYI, Shiv estimates that there may be a 15 whp difference between the cast and tubular manifolds on his 30R kits on race gas, and no difference with pump on his kit. Spool is identical (3300 rpm boost spool, 4000 rpm max boost pressure).

 

Yeah I like the Vishnu Unit, it looks good but retains the stock manifold, on a GT30 series turbo it'll hurt performance in MANY ways. I like the AMS unit, I like teh Buschur unit as it works wit Buschur parts and is VERY cheap, but no Dyno numbers.

ATP I would not bother with.

 

well if anyone out there has any of the three kits please post dyno numbers or 1/4 mile numbers. i personally love atp stuff. i used to own a golf 1.8t with some of there stuff on there and loved it. not only that they are realitively cost effective. the vishnu kits looks awesome and i dont like the looks of the buschur kit. buschur products are awesome as well so, i think any kit here would be great fun to have. as far as research and development goes i would say shiv at vishnu knows what he is doing.

 

Well the Vishnu kit hit's 460whp on 109 race gas with the 30R on a 3300 rpm spool with stock manifold. And that's in 100 degree weather.

Don't know what ways you are talking about as far as hurting performance in MANY ways.

It looks stock, is very quiet, climbs the dyno charts identically to the Vishnu stage 3 tubular manifold except for top end hp. The stage 3 put down 30 more top end hp, some of which Shiv thinks was do to 30 degree cooler weather, a leaner a/f ratio, and c16 vs 109 fuel. That's why he thinks the tubular might only be worth 15 whp - if that.