drivermod1

Hey guys, I have an Evo 8 mr with the stock turbo (10.5 hot side with titanium wheel) running 28 psi on e85 with supporting mods, still on the stock cam at the moment though. I am almost convinced that the HTA 71 is the turbo I’m looking for. I’ve read nothing but good reviews on it. I had a few questions I would like to ask.

How much spool roughly will I lose over my stock Evo 8 mr 10.5 turbo? In my 8, I can put my foot down at 3500rpm and it’ll just sling shot away. Super fun on the road. Just lacks top end without a bigger turbo and cam. Will the HTA71 still be able to come on really hard at 3500 and slingshot like the 8 turbo or will I have to change my driving style and flaw it at 4000rpm for example?

also, would anyone have dyno sheets of this turbo on a stock motor maxed out on e85, with a cam or without a cam for reference? In Australia we use Mainline dynos which are similar to mustang dynos. Sorry if this has been asked before, but I haven’t seen many sheets on mustang dynos, most the sheets I’ve seen are on the dyno jets which read a lot higher of course.

‘I’m hoping this turbo can make 400 hp plus on a mustang dyno with a stock block and can drive similar to my 8 mr turbo. That will seal the deal for sure and make it an easy decision.
thanks a lot everyone!

LetsGetThisDone

iTrader: (1)

The 71hta only looses a couple hundred rpm in spool up vs a stock turbo you won't be disappointed.

drivermod1

Thanks for the reply. Hopefully I can still plant it around 4 k then and get a good rush out of it. Still love the smaller turbos on the street. They sling shot away from a lot of high powered cars, even without break boosting them

MinusPrevious

iTrader: (3)

@drivermod1 Here's my stock EvO9 block w/S2's for reference. (HTA71 w/cams on E85 at 24 PSI)

drivermod1

Very impressive. When abouts are you making full boost if you don’t mind me asking? I got no mivec on the 8 obviously so I’m assuming I’ll make it another 200 or so rpm later then you. And how different are dynapack to mustang dynos? Would that still be over 400whp on a mustang?

drivermod1

also just to double check, do you mean a couple hundred RPM later then an 8 mr turbo or the 9 turbo? 9 turbo with the bigger compressor would come on slightly later then the 8 mr I’d assume? Sorry for so many questions.. none of the tuners I know of in Australia use the 71 hta for some reason.

Jaraxle

It's a stock turbo with basically a 20g compressor and surge housing installed, that's it. So if your running out of compressor efficiency it will help, if your bottle necked on the hot-side it won't change that.

RazorLab

iTrader: (8)

Here is an Evo 8, 3rd gear with HTA71. You'll barely notice a difference in spool

https://datazap.me/u/razorlab/scott-...11&solo=4-9-11

Same car, log of a 11.9@118 1/4 mile run: https://datazap.me/u/razorlab/scott-...-6-16-17-19-36

MinusPrevious

iTrader: (3)

Not sure about when full boost was seen. I should have asked for those parameters when i got tuned. DynaPack is similar to the Dynojet. Mustangs are (dont quote me) about 18% lower in value? The only thing i regret was not getting larger injectors (RC1000's & they are tapped out) & the O2 housing

drivermod1

great time and mph although I’m a touch confused now lol. I ran my car last year with stock unmodified 8 mr turbo on only 25 psi and ran 118mph as well. Surely the HTA71 will get me more mph. How much wheel horse power over an 8 turbo should this thing do?

RazorLab

iTrader: (8)

*shrug*

I was sharing the log for turbo transient response reference. Lot’s of factors go into play on the actual time. The car was full weight with a roll bar and 18’s.

LetsGetThisDone

iTrader: (1)

There is data all over this forum on how the 71hta performs.

RSMike

iTrader: (1)

BEWARE - The Titanium exhaust wheel might not live at that shaft speed.