400HP Firestorm Red FBM Kit

[ft86xtc]

I see your puttin in work up there, im surprised i thought everyone went to importwars at great lakes. Nice runs though!

[ravenblackfrs]

Originally Posted by FullBlown

-FBM Stage 1 Base kit with gtx28 upgrade

-FBM 3" Exhaust

-ACT clutch

-FBM Custom 93/E85 tune

Stock VS 93 Pump VS E85

I won't lie, this video gave me chills and damn near got wood!

[mack4477]

Originally Posted by ravenblackfrs

I won't lie, this video gave me chills and damn near got wood!

You should try driving it

[Frs300]

@mack4477 anymore videos? i guess i could check youtube chan myself

[mack4477]

Originally Posted by Frs300

@mack4477 anymore videos? i guess i could check youtube chan myself

Nothing since the last batch. Haven't had much time to set anything up. Got a buddy with a 525ish awhp Evo moving to town next week. That should be pretty damn close

[FRSTEVE]

@mack4477 - fantastic results. I was wondering up top, where the WHP starts to drop off, is that intentional (easier shifts) or is the turbo out of steam up there?

I was personally thinking of a GTX30R, but wanted to right size things (match intercooler capabilities, with various pipe diameters and the staying in the good range for the turbo).

Thanks.

[mack4477]

Originally Posted by FRSTEVE

@mack4477 - fantastic results. I was wondering up top, where the WHP starts to drop off, is that intentional (easier shifts) or is the turbo out of steam up there?

I was personally thinking of a GTX30R, but wanted to right size things (match intercooler capabilities, with various pipe diameters and the staying in the good range for the turbo).

Thanks.

The GTX28 does run out of steam a little earlier than some of the slightly bigger turbos. But for me, the extremely fast spool was worth the trade. As far as matching things up perfectly, I would talk to LJ @FullBlown. The man knows his stuff

[King Tut]

Originally Posted by FRSTEVE

@mack4477 - fantastic results. I was wondering up top, where the WHP starts to drop off, is that intentional (easier shifts) or is the turbo out of steam up there?

I have found that the GT2871R loses as much as 2 psi from max boost at 8000 RPM.

[FRSTEVE]

@king_tut and mack4477 - thank so much for your replies, its very helpful.

@king_tut - you mention a 2psi drop at top, was wastegate duty cycle maxed out? If so, have you considered using a stronger wastegate spring to see if it keep things shut at 8000 rpm? I usually assume pressure drop is due to something leaking (wastegate, BOV). The drop in power at same boost levels would be due to running out of the efficiency cycle of the turbo. I really would like the spool of the smallest turbo, that can make power using all the revs available to us (and not much more than that).

did you guys consider asking for a twinscroll option? have the manifold go 4-2 or put a divider at the housing interface?

thanks again!!!

[Tansey86]

Originally Posted by FRSTEVE

@king_tut and mack4477 - thank so much for your replies, its very helpful.

@king_tut - you mention a 2psi drop at top, was wastegate duty cycle maxed out? If so, have you considered using a stronger wastegate spring to see if it keep things shut at 8000 rpm? I really would like the spool of the smallest turbo, that can make power using all the revs available to us (and not much more than that).

did you guys consider asking for a twinscroll option? have the manifold go 4-2 or put a divider at the housing interface?

thanks again!!!

If you are looking to make more power up top a twinscroll application is the last thing you want to do. From what ive heard twinscroll setups focus more on the midrange and tend to taper off up top. They are also only truly benefitial on larger frame turbos(i.e. 6262, gtx35r etc)

[FRSTEVE]

Originally Posted by Tansey86

If you are looking to make more power up top a twinscroll application is the last thing you want to do. From what ive heard twinscroll setups focus more on the midrange and tend to taper off up top. They are also only truly benefitial on larger frame turbos(i.e. 6262, gtx35r etc)

Makes sense, i'm just used to evo twin scroll since their runners are so short and the have so much exhaust velocity, it can drive it efficiently (great spool and a properly matched top-end). Unfortunately, our boxers aren't designed that way.

I really wouldn't consider running a 62 frame on such a small motor. I have a PT5858 CAE, ball-bearing in my 6 cylinder, 3.0 liter motor and its pretty well matched, but would I would think it it would be too laggy for a 2.0 liter even with our higher compression motors.

[Dipstik-sportech]

I actually was considering switching to a pte 5858 bb sometime in the near future. My buddy has a gt40 on a 2.0l Honda and it makes useable boost at 4000rpm on a top mount manifold. I never understood why people talk about lag. Our cars are so short geared you'd be hard pressed to fall out of boost, and if they mean if you're on the highway and u punch it in 6th well most anything short of a diesel will lag that's y we downshift lol. Who races from 6th lol

[King Tut]

Originally Posted by FRSTEVE

@king_tut - you mention a 2psi drop at top, was wastegate duty cycle maxed out? If so, have you considered using a stronger wastegate spring to see if it keep things shut at 8000 rpm? I usually assume pressure drop is due to something leaking (wastegate, BOV). The drop in power at same boost levels would be due to running out of the efficiency cycle of the turbo. I really would like the spool of the smallest turbo, that can make power using all the revs available to us (and not much more than that).

I am running a 9.7 psi spring in my wastegate currently. My guess has been running out of efficiency of the turbo is causing it. I know the AVO kit performs similarily, but not many people on this forum post boost plots that I can compare mine to. I also have my dump tube recirced which most don't and I think that might be causing the weird bump/dip I get at 6000 RPM. Here is my current boost plot:

[pmccut]

Originally Posted by King Tut

I am running a 9.7 psi spring in my wastegate currently. My guess has been running out of efficiency of the turbo is causing it. I know the AVO kit performs similarily, but not many people on this forum post boost plots that I can compare mine to. I also have my dump tube recirced which most don't and I think that might be causing the weird bump/dip I get at 6000 RPM. Here is my current boost plot:

Mine has always tapered off as well. GT2871R, open dump tube.