Gtx2860 gen2-- 373whp/351tq-- 22psi
#22
Senior Member
Thread Starter
Join Date: May 2017
Location: Louisville,KY
Posts: 1,132
Total Cats: 97
As I told you before, on the boost side I think you’re on the limit. I even used a two port wastegate, making it close as much as possible without much success. Maybe on colder weather could get a tad more. On the lower rpms I can shoot it to over 25 psi easy.
Your 400 on 98 can be possible with cams, or maybe just cam timing.
What ignition timing are you runing at that boost level?
Your 400 on 98 can be possible with cams, or maybe just cam timing.
What ignition timing are you runing at that boost level?
#23
Senior Member
Thread Starter
Join Date: May 2017
Location: Louisville,KY
Posts: 1,132
Total Cats: 97
IAT isn't an issue I have a large Garrett intercooler.
#24
Senior Member
Thread Starter
Join Date: May 2017
Location: Louisville,KY
Posts: 1,132
Total Cats: 97
To me my car is unusually torquey compared to other Miatas that are boosted. When I was running the 2560 I made 308ftlb and 296whp. I run a JDM 4w head and a flat top manifold. I have heard that the 5a intake cam timing is 2* advanced but I can't confirm that. Could maybe account for my high tq numbers. Also I am kicking around the idea of getting cam gears to see if there is anything there. Most everyone says waste of time. But I like to play with things
#25
20* timing at the top 15* in the middle. Yea it could be at it's limit but I like to have fun with it. Putting a 2867 is the easy button so I wanna see what more I can get out of it first. Should be interesting. Do you have a Dyno or anything from your setup? Sounds like you are pushing this turbo as well
Its not my car, just a car I tuned. You’ve got that advance pretty cracked up.
i was not implying you have a problem, making max power sooner, just pointing that shifting that power up the rev range may be the key for getting that 400hp.
#26
To me my car is unusually torquey compared to other Miatas that are boosted. When I was running the 2560 I made 308ftlb and 296whp. I run a JDM 4w head and a flat top manifold. I have heard that the 5a intake cam timing is 2* advanced but I can't confirm that. Could maybe account for my high tq numbers. Also I am kicking around the idea of getting cam gears to see if there is anything there. Most everyone says waste of time. But I like to play with things
#27
Senior Member
Thread Starter
Join Date: May 2017
Location: Louisville,KY
Posts: 1,132
Total Cats: 97
Not so easy button when Garrett is shuted down
Its not my car, just a car I tuned. You’ve got that advance pretty cracked up.
i was not implying you have a problem, making max power sooner, just pointing that shifting that power up the rev range may be the key for getting that 400hp.
Its not my car, just a car I tuned. You’ve got that advance pretty cracked up.
i was not implying you have a problem, making max power sooner, just pointing that shifting that power up the rev range may be the key for getting that 400hp.
Garrett will be ok someone will buy them. There are enough 2867s floating about, but Garrett better not go anywhere!!! Lol
From what I've learned tuning my own car it really wants the timing up top and it wants more but I can't give it to her. Probably need e85 for that lol.
#35
mkturbo.com
iTrader: (24)
Join Date: May 2006
Location: Charleston SC
Posts: 15,193
Total Cats: 1,685
I have a Gen2 GTX2860R on the way to me in a T3 housing. I also have a local friend with a Gen1 GTX2863 on his miata. I am looking forward to testing them against an EFR. Also comparing to what andyfloyd hit.
#38
Senior Member
Thread Starter
Join Date: May 2017
Location: Louisville,KY
Posts: 1,132
Total Cats: 97
The last gtx2860r I did was a total powerhouse, made 340 at 15psi on e85, but it was a 10:1 motor
https://www.instagram.com/p/CEs6aEdHgOL/?utm_source=ig_web_button_share_sheet
I'd say it's pretty close to the efr if not similar.
https://www.instagram.com/p/CEs6aEdHgOL/?utm_source=ig_web_button_share_sheet
I'd say it's pretty close to the efr if not similar.
#40
Senior Member
Thread Starter
Join Date: May 2017
Location: Louisville,KY
Posts: 1,132
Total Cats: 97
I have a built head that is pretty much ready at the machine shop, part of me wants to get a 2867R and make over 400whp easily. I probably wont, and ill stick with the 2860 and max it out but you know how it is with boost. You always want more.