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MAP EF-series Turbochargers results thread

 
Old Jul 31, 2011, 02:20 PM
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Nice results, off topic but what size/offset are those RPF1's? Thanks
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Old Jul 31, 2011, 02:24 PM
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Originally Posted by getsideways View Post
Ive tried the low timing method , even though it creates more boost earlier , the car feels laggy . And according to VD tests ive done , makes less power in spool versus shooting for high 12 AFRs and maxing timing to the engines desire (however peak torque was made earlier and came on stronger which is undesirable to me on a stock block). That was on the stock turbo though , maybe with this larger one it could change.

The statement that richer AFRs create higher EGTs is false by itself , This is common knowledge, (Only when coupled with very low timing could this be correct) . Decreasing timing would be primarily responsible for the higher EGTs .

I will try the low timing and slightly richer method later this week and post back to back results.
That can be true. Since a richer AFR & lower timing is not optimum for power production, then sometimes this method isnt the absolute best. Since making power can make the car faster then spooling the turbo quicker, its about finding a perfect balance of faster spool and power delivery.

Originally Posted by RSMike View Post
I have seen lean mixtures make a turbo spool much faster than a rich mixture.
You forgot to add cam timing to your list. Intake cam advance will make boost quicker
Again true. Every car is different. Some people have reported better spool with richer AFRs and some with leaner AFRs.

The list isnt mime. It came from that thread, which was a resent thread about the subject.

You are correct. Intake cam advance does greatly help spool and should be included at the top or near the top of that list.
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Old Jul 31, 2011, 02:53 PM
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Originally Posted by Guerillah View Post
Nice results, off topic but what size/offset are those RPF1's? Thanks

I have two sets not sure which they are
17x9 + 35 Probably these
17x9.5 +38
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Old Aug 3, 2011, 03:24 PM
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I gave the low timing a shot , not even worth posting results , Lost nearly 400RPM of power, Made peak torque a little earlier , but at cost of major power under the curve.

Next im going to run a fuel injector into the hotside , and i gaurantee i will get torque like a diesel truck with zero lag
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Old Aug 3, 2011, 03:42 PM
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Originally Posted by getsideways View Post
Ive tried the low timing method , even though it creates more boost earlier , the car feels laggy . And according to VD tests ive done , makes less power in spool versus shooting for high 12 AFRs and maxing timing to the engines desire (however peak torque was made earlier and came on stronger which is undesirable to me on a stock block). That was on the stock turbo though , maybe with this larger one it could change.

The statement that richer AFRs create higher EGTs is false by itself , This is common knowledge, (Only when coupled with very low timing could this be correct) . Decreasing timing would be primarily responsible for the higher EGTs .

I will try the low timing and slightly richer method later this week and post back to back results.
the low timing is a balancing act for all set-ups on e85.....

i ran a stock evo8 turbo on my 2.3 on several occasions on e85...

with regards to timing during spool-up:

normal timing made more power than the low timing set-up....

low timing made 25psi @ ~2700 rpm, normal timing made ~14psi @ 2700 rpm....

on my fp-blk, i made more boost & more power with low timing

what do you want, make more boost or more power

it's all a balancing act. i will post the e8 turbo power vs boost compare later on tonight if i remember.
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Old Aug 3, 2011, 09:59 PM
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e85 is a different animal then pump gas tho I would love to run it too bad its such a PITA at big track events
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Old Aug 4, 2011, 11:04 PM
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I can't wait to get my motor together so I can post results..... Motor is at MA Performance getting built.

MA short block 2.0L (Manley long rods, pistons, 9:1)
EF3 Turbo
Full Race Manifold
Invidia 02
Nisei full pipe kit
ETS 3.5 IC
GSC S2's/beehives
Ported head
Perrin intake


I was originally going to run e-85 but they pulled it from the pumps here. Gonna run a VP 109/91 cut mix

I am really curious to see what kinda power I will make.
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Old Aug 5, 2011, 08:27 AM
  #38  
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Originally Posted by getsideways View Post
e85 is a different animal then pump gas tho
true...

sorry, thought you were on e85, thats why i referenced the fuel i used.....

if pump gas, then ign timing has always helped me out down low with power, regardless of what the boost was doing...as long as you dont have a boost leak, leaky bov, bad w/g settings or ebc/mbc.

keep after it
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Old Aug 5, 2011, 11:01 AM
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Good Read. Thanks for posting up data.
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Old Aug 5, 2011, 12:26 PM
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Thanks for the kind words and help!
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Old Aug 15, 2011, 02:02 PM
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I upped the preload as suggested , and made some Mivec tweaks , Up top i was able to pick up 20 WHP from 435-457 Over 7K. this is at a spike of 26 pounds of boost.

It appeared to hold boost a little better up top , this was also on crappy 92 octane gas.
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Old Aug 20, 2011, 08:16 PM
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How many turns on the preload did you give? I just hit Cobbs dyno today and was at 28psi tapering to 23psi and made 478whp and 425wtq. Map 2.3 10.5:1 CR ported everything EF3 stock housing. Once I get more fuel and get more boost up top I expect well over 500whp This EF3 is a damn good turbo!!!
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Old Aug 20, 2011, 08:30 PM
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Originally Posted by PlanoEvo View Post
How many turns on the preload did you give? I just hit Cobbs dyno today and was at 28psi tapering to 23psi and made 478whp and 425wtq. Map 2.3 10.5:1 CR ported everything EF3 stock housing. Once I get more fuel and get more boost up top I expect well over 500whp This EF3 is a damn good turbo!!!
Cams?
Manifold?
Fuel?

Thanks!
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Old Aug 20, 2011, 10:17 PM
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On your 2.3 im betting maxing the preload will work best , i tried it and boost was at 28 holding right to redline on my 2.0.
Currently im at about 1\4 of the actuator arm eye , this is how far i have to pull it to get it over the Flapper peg.
Half of the eye would probably be ideal for you!
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Old Aug 20, 2011, 11:27 PM
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really good article to read, thanks everyone
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