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Underbody braces, turbos and more!

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PostPosted: Tue Feb 12, 2013 3:10 pm 
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Joined: Sun Nov 27, 2011 12:56 am
Posts: 44
Location: oregon
So as I'm rebuilding my sprint I'm trying to get some things figured out. One of my questions is I'm going back to stock injectors (or as close as I can get) and I have a mr2 maf on the car. I was running 440cc injectors and it was running 10.5-11 on the AFM all the time. Mileage sucked. I know this MAF is somewhat larger and i'm wondering if I need to find a stock MAF too. Basically I'm wanting to get mileage out of it for now for a commuter and eventually I'm going MegaSquirt but not yet. Or am I able to adjust the MR2 Maf far enough to get 40mpg?


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PostPosted: Tue Feb 12, 2013 4:53 pm 
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Joined: Tue Feb 13, 2007 10:28 pm
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Location: So Cal, USA
Since he was running 20PSI, the larger injectors would have been required.
Go back to the 210 OE injectors and your mileage should get better as
well as your A/F ratios if you are going for a relatively stock set up.
The reason for the MR2 MAF was probably to eliminate the fuel cut and
the larger diameter tubing for more flow, But the way he had it set up
was a bit wack. You want the MAF as close to the turbo as possible if you
are going for performance. At least, no longer a run as the OE set up.
If you put a stock maf back on, you will have the fuel cut issue
if you up the boost over 10PSI.


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PostPosted: Tue Feb 12, 2013 7:03 pm 
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Joined: Tue Oct 18, 2005 6:56 pm
Posts: 6347
Location: Emerald city Washington
JamalSpelling wrote:
Since he was running 20PSI, the larger injectors would have been required.
Go back to the 210 OE injectors and your mileage should get better as
well as your A/F ratios if you are going for a relatively stock set up.
The reason for the MR2 MAF was probably to eliminate the fuel cut and
the larger diameter tubing for more flow, But the way he had it set up
was a bit wack. You want the MAF as close to the turbo as possible if you
are going for performance. At least, no longer a run as the OE set up.
If you put a stock maf back on, you will have the fuel cut issue
if you up the boost over 10PSI.


.
True true but if your going for the "Mileage"....
yes stock injector and stock MAF...... but there are way to get around the Fuel cut off over 10PSI of boost
just know you'll be pounding the shit out of the stock turbo with the boost pulse and they won't hold up
T3ragtop told me so..But I wouldn't listen
but you guys knew that
and Please please post pictures of the carnage......jv&s
.
.

.
Image

_________________
.

t3 ragtop wrote:
the 3 banger isn't at all a "grenade." it's a tough little son of a bitch doing a big job. respect it.
suprf1y wrote:
I didn't save anything.Vehicles are to me, like little boys are to Tommy.Toys to be abused for my own personal pleasure.
jrjd wrote:
"Driving a Swift GTi is like driving a bike in your house".


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PostPosted: Tue Feb 12, 2013 7:52 pm 
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Joined: Tue Feb 13, 2007 10:28 pm
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Location: So Cal, USA
Yes, but there are problems with blocking the vane from fully opening
to prevent fuel cut. At WOT you will not get the maximum fuel
enrichment and will go lean as well as other various functions
the ECM puts out when at WOT.


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PostPosted: Wed Feb 13, 2013 2:48 am 
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Joined: Sun Nov 27, 2011 12:56 am
Posts: 44
Location: oregon
So it sounds like going with 210 oe injectors and sticking with the Mr2 Maf is fine then. And yes he told me he was trying to do a poor mans way of running high boost. He removed the intercooler and was going to run water/meth but never got to it. I will probably do the same thing eventually though I'm still considering putting a small front mount intercooler for now.


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PostPosted: Wed Feb 13, 2013 10:02 am 
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Joined: Tue Feb 13, 2007 10:28 pm
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Location: So Cal, USA
The stock I/C is perfect for the stock setup.
Running boost at almost 3 times the stock level
mandates a really big intercooler. The charge air
must have been wicked hot, I can only think of all
the HP he was losing by not running any sort of I/C
set up.
Detonation is a huge factor with high intake charge
temps, I think the only reason he didn't take out a piston
is the large injectors may have provided just enough
cooling to prevent the big bang.


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PostPosted: Thu Feb 14, 2013 2:36 pm 
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Joined: Sun Nov 27, 2011 12:56 am
Posts: 44
Location: oregon
Yep I agree. I guess it goes to show these lil motors are tough. It did have one burnt valve too though.
Ground Rat is pretty hard on cars. I pulled the motor out of his GMC Typhoon because there was 50 psi on one of the cylinders. Turns out 4 out of 6 pistons had seriously broken ring glands. I have no idea how the thing was able to even run! :roll: Plus the crank was shot.
When I got the sprint from him he said he thought it had a bad hg ( because there was serious oil burning). Found out the turbo was bad ( oil seal COMPLETELY gone) and was full of oil on the intake side. Got a new one and was my dd for a while until it started smoking again when reved that's what brought me to here.
And unfortunately when he made the mods for this car he threw away all the original stuff (like stock I/C, stock injectors and the complete interior etc). Bummer :cry:


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PostPosted: Thu Feb 14, 2013 4:14 pm 
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Joined: Fri Dec 18, 2009 2:18 pm
Posts: 199
Location: San Diego , CA (alpine)
velorossa wrote:
Yep I agree. I guess it goes to show these lil motors are tough. It did have one burnt valve too though.
Ground Rat is pretty hard on cars. I pulled the motor out of his GMC Typhoon because there was 50 psi on one of the cylinders. Turns out 4 out of 6 pistons had seriously broken ring glands. I have no idea how the thing was able to even run! :roll: Plus the crank was shot.
When I got the sprint from him he said he thought it had a bad hg ( because there was serious oil burning). Found out the turbo was bad ( oil seal COMPLETELY gone) and was full of oil on the intake side. Got a new one and was my dd for a while until it started smoking again when reved that's what brought me to here.
And unfortunately when he made the mods for this car he threw away all the original stuff (like stock I/C, stock injectors and the complete interior etc). Bummer :cry:

It think I have a bag of mk1 t3 injectors dont mnow if they work, apso have a stock ic pm me


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