Awsome info and thank you for sharing.

I was going HTA71 for my street evo 9 build. Occasional track days. (not drag).

But the FP Red BB graph really looks amazing without much spool compromise.

 

HTA71 vs Red there will be a definite spool difference. As Abacus pointed out, the only time I would suggest the HTA71 is autox.
If by track you mean actual track, you'd definitely be better served with something a bit larger like the green or red.

I have an MHI JB Red and absolutely love that thing.
I also have a JB Green super core (everything minus exhaust housing) hanging around that I can't decide if I want to sell or not lol.

 

I will be doing mostly canyon runs for fun. Nothing hardcore. And there is a circuit near by as well. Might do that once a year. But mostly street fun.
I have owned Evo 8 and two Evo X before. All were stock turbo between 300 to 400whp, and I was satisfied.

Since I will be spending to build the block, utiltizing a red with the 2.0 with that graph Abascus posted looks fun for the street . And the red should make ok power with 91 octane (Im in AZ), versus the HTA71.

I can get e85 but its an hour drive from me - may have to look into storing some in garage.

 

Yea, I'd probably look to the green or red then. At that point it basically comes down to preference. The green is a absolute blast in terms of spool around town on a built engine but it does give up 50ish hp up top to the red.
Given the 91 restriction, the red is probably still the better choice.

E85 is pretty awesome man. On my flexfuel setup, its basically like driving 2 different cars. On 91, I make like 350hp ish at 17lbs but on E85 its about 600 at 37 lbs lol.

 

Hahah yea. E85 is where its at for sure.

I forgot to mention I do use a 6spd. But I have never broken an evo tranny in all my years of ownership. I dont bang the living hell out of gears.

Red sounds like a good compromise. 4k to 8k is a nice power band for some smooth canyon runs for fun.

Green sounds good too, as I prolly wont be even chasing high HP numbers, for a better spool ! Decisions lol !

 

I have a 6 speed too. In my experience, getting them hot is what really does them in. For street driving and stuff, its still a pretty solid transmission.

I actually found a virtual dyno overlay of the green on stock bottom end and E85 vs the red on my build 2.0 on E85.
You can see that the green picks up quite a bit earlier in the RPM range(the pull started a bit earlier, but you get the point) but in my case we slowed the spool a bit to keep that peak torque down to save the stock rods.
The Red graph was logged during tuning so the AFR isn't quiet right but its what I have to show lol.

 

Thank you for sharing ! Great info.

Seems like the green would pack a nice punch with a built bottom end. I will be using manley Hbeam rods.

I plan to stay stock 9 cams as well.

 

The Green on a built bottom end will be a low end monster for sure. I am on eagle h-beams.,

With the stock 9 cams, that would pull the spool in even a bit further I think at the expense of the top end. I'd suggest cams to take full advantage of the larger turbo though. Its really going to choke out up top with the stock cams. I have a set of cosworth M2s I'd let go cheap if you are interested. They are just sitting in my shop right now lol.

 

I will keep that in mind thank you.

I wont be pulling down my motor until next year.

Once that is done and the machine shop verifies the crank and block is ok, I will proceed to the spending

I know that's not for now, but I wont forget to check back with you when its go time.

Thanks again !

 

So do you think. Stock block, with full bolt ons and GSC s2 cams. Dual map 91 and e85. Trying to save the stock block by keeping torque in check. Would there be any benefit with going with the Green over the Red?

 

So far, I have not needed to run an anti surge cover. The biggest benefit to the TF06-18k over the other aftermarket MHI turbos for me is the price point ($1600.00) and smog friendliness. The compressor cover has a stockish style label on it as well which should help fool the smog *****.

 

There will still be some spool benefit of the green over the red. Even if you have to slow the spool and/or limit the boost to keep it under 400wtq, the green would still out spool the red.

Now that said, given the setups I have been through, I would probably go with the red personally. My car is a street car that does mostly highway pulls and the occasional drag event. I am willing to give up a bit of spool for the power to carry as deep into the RPM range as possible. This is 100% personal preference though. If you drive your car a lot in town with lights and traffic, the spool benefit of the green will show itself more than my use case.

One other thing is that I prefered my green setup on 91 vs the red on 91. Some of this comes down to picking to build a 10.5:1 motor but the green on 91 and the stock block just hit a lot harder than the red. This doesn't matter to me as I just run E85 all summer and only use 91 for storage now but its worth thinking about what fuel you intend to run most of the time.

 

Would you say that the green would start to punch at like 3500rpm while the red would be more like 4000rpm?

She is still my daily. So I am thinking the greens faster spool might make me happier. Especially coming from the 71hta.

 

Probably something like that? There are a lot of variables when determining when the turbo will spool but there is about a 500rpm difference from the green to the red.
The setup you are looking at is pretty common with both the green and the red so I'd go hunt through the dyno results section and see if you can find a few examples of each to compare and make a decision from there.

 

Ill do that. Pretty stoked to eliminate two turbos but now added the red to the mix. Research never ends, lol.