rustrocket Posted September 11, 2006 Share Posted September 11, 2006 Hey everybody. I'm in the midst of doing a ka turbo swap into my triumph spitfire. My original plan included a holset hx35 turbo, but after mounting it on the engine and sitting the engine in the car, i've realied there is no way i can make it work because the physical size of the turbo severely limits my manifold and placement options. So i come to you guys looking for the smallest turbo possible that'll support around 425 horsepower to the wheels. A couple people have suggested to me the Garrett 2871? model, but the $1100 pricetag makes my wallet cringe. Any suggestions would be great. It doesnt matter if it's a t3 or t4 flange, as the final manifold hasn't been made yet. Thanks. Quote Link to comment Share on other sites More sharing options...
nismopick Posted September 11, 2006 Share Posted September 11, 2006 Did you take pics of the setup when you dropped it in the engine bay? If so, post it. There's usually a way to "tweak" things when necessary. Was the turbo hitting the inner fender? Quote Link to comment Share on other sites More sharing options...
rustrocket Posted September 11, 2006 Author Share Posted September 11, 2006 Here it is...the turbo is so big that A: It hits the wheel arch (one piece front end similar to viper) B: The exhaust housing is right up against the firewall. After talking to a couple manifold guys, they told me getting a smaller turbo was the only way i could work with my setup. Quote Link to comment Share on other sites More sharing options...
MrFancypants Posted September 11, 2006 Share Posted September 11, 2006 That's pretty big... Any reason why youve chosen 425 whp? Do you have a specific 1/4 mile goal in mind? If you want big horsepower in a small package, then you need high efficiency. That means Garrett GT, and that means >$1000 I'd stay away from the T3/T04 unless you like lag, and it's not particularly small in size either. The 2871 is a very good, efficient turbo. I'd suggest the GT28RS Disco Potato, but thats a little shy of your horsepower goals, and is still $900+. You could also try finding one used. - Greg - Quote Link to comment Share on other sites More sharing options...
rustrocket Posted September 12, 2006 Author Share Posted September 12, 2006 I've chosen 425 horsepower because i'm obsessed with big numbers and excessively powered cars. 425 would give me roughly 1 horsepower per 5 pounds laden weight... I dont ever plan to drag race this thing...it'll see some track time though, at thunderhill or sears point. Do you have a 2871 or disco potato on hand that you could measure for me? The appeal of the 2871 is the dual ball bearing...How much bigger is the gt30r? Quote Link to comment Share on other sites More sharing options...
MrFancypants Posted September 12, 2006 Share Posted September 12, 2006 Do you have a 2871 or disco potato on hand that you could measure for me? I have a DPT I can measure for you. The compressor housing is the big part' date=' obviously, but let me know what you want measured. Or you could go here: http://www.atpturbo.com/root/turbopiping/dimensions/gt28rsdim.htm Looks like they claim the 2871 will only flow enough to support 400 whp. If youre set on 425, you may have to go with a 3071 or bigger. Definitely go with a Garrett GT turbo though. They are head and shoulders above the competition in technology and efficiency. Here's a good list: http://www.atpturbo.com/root/turboinfo/gtlineup/gtlineup.htm - Greg - Quote Link to comment Share on other sites More sharing options...
Lunar240z Posted September 12, 2006 Share Posted September 12, 2006 ive got a gt2871r. i got it with a T3 turbine housing for use with an external gate, and a 4" compressor inlet. depending on how you clock it, its basically a 9x9x9 cube...[its a little smaller than that actually] ive heard they're good for around 400hp... idk the exact amount... hopefully mine can make a bit more because it'll be able to flow more, the basic gt2871 is like a t28. pics price was 1145 shipped iirc from himni racing.com Quote Link to comment Share on other sites More sharing options...
rustrocket Posted September 12, 2006 Author Share Posted September 12, 2006 Man...i've been spoiled by <$500 holsets. Quote Link to comment Share on other sites More sharing options...
Careless Posted September 12, 2006 Share Posted September 12, 2006 Man...i've been spoiled by <$500 holsets. gotta pay to play when you want to keep weight/size down and efficiency up. why not splurge on a good turbo? COME ON!!! you know you wanna Quote Link to comment Share on other sites More sharing options...
veritech-z Posted September 12, 2006 Share Posted September 12, 2006 YOU'VE been spoiled? I got a Garrett T-04 from a buddy with hardly any shaft play at all for $50! Barely looks like it's been used at all, truth be told...Also got an intercooler from his brother for $40... Quote Link to comment Share on other sites More sharing options...
Scottie-GNZ Posted September 12, 2006 Share Posted September 12, 2006 Before you go off and spend more $$$, a smaller turbo will have smaller housings but is not going to solve the problem of the exh housing being so close to the firewall. The turbo needs to be moved forward. Quote Link to comment Share on other sites More sharing options...
veritech-z Posted September 12, 2006 Share Posted September 12, 2006 How about putting it sideways, between the engine and the radiator? do you have room for something like that to work? Quote Link to comment Share on other sites More sharing options...
Clifton Posted September 13, 2006 Share Posted September 13, 2006 gotta pay to play when you want to keep weight/size down and efficiency up.why not splurge on a good turbo? COME ON!!! you know you wanna A GT series turbo isn't any more effecient on the compresor side. They aren't any smaller or lighter for similar HP rated turbos. The exaust wheel efficiency may lead to a slightly faster spool but what's 100-150 rpms compared to the extra $500+. I would use a log manifold instead of that turbo header and move it in and forward. Do you have a top pic? Quote Link to comment Share on other sites More sharing options...
rustrocket Posted September 13, 2006 Author Share Posted September 13, 2006 Thanks for the suggestions everybody. I dont have a top pic, but after talking to a turbo vendor, he offered the suggestion of changing the exhaust housing. My current housing is designed for the dodge 2500...Bullseye power makes a stainless housing that is significantly narrower. Between this and moving the entire unit forward on a long manifold by about 2 inches, i think i can manage. Should i be concerned about the compressor housing being close to the spark plug wires/distributor? And veritech, i would say you've been more spoiled than i have!! For reference, here's a pic of the dodge holset housing vs. the bullseye power housing: Quote Link to comment Share on other sites More sharing options...
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