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Help, What should I do to the car next?
#1

My main goal for the SVO is to auto-x and then step up to track days in a year or two. My current setup is:

Big Valve motorsport head, brown tops, PE, cold air, stock turbo, 3" down and exhaust, ported intake and exhaust manifold, NPR front mount, full poly bushings, 2" drop spring, subframes, 8.8 rear, a237 cam, 255lph pump.

Would I benefit more from a different turbo or possibly a stand alone engine management system. Would I see any change with going to a larger injector?

I am truly at a loss and dont know what to do. I love the car as it is but I, like most everyone else, would like it to go faster and handle better.
85 C-Prep,3" ex,P&P Big valve, svo+ computer,2" drop,p-bushings, NPR, cold air,3.55/8.8 rear,BIG sway bar, strut bar.
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#2

OK I will probably get trashed for saying this but for an auto-x car an IHI turbo from an '87-'88 Turbocoupe would be better. Very fast spool-up and better throttle response. I auto-x an XR4Ti so I know how you feel, coming off the corners can be a PITA waiting on boost but at least you have a T-5 and can shift better than my old T-9!
Ohio State Buckeyes 2002 National Champions
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#3

good idea about the IHI cause it spools faster but dont they get inefficient past 18psi? and im assuming your running more than 18psi as of right now correct? so maybe a hybrid? i dont know much about them. do they spool any faster? and what exactly is a hybrid?
Dug

"Cars are the monocle through which I have always viewed the world...." -Jim Williams
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#4

Quote:Originally posted by dug:
good idea about the IHI cause it spools faster but dont they get inefficient past 18psi? and im assuming your running more than 18psi as of right now correct? so maybe a hybrid? i dont know much about them. do they spool any faster? and what exactly is a hybrid?
a hybird is a combo of a t3 turbo and a t4 turbo or at least mostly refered to on this board. the bennifit of a hybird is more boost simular to the t4 but will lees lag time keeping the t3 response.

Quote:Originally posted by Mike T:

OK I will probably get trashed for saying this but for an auto-x car an IHI turbo from an '87-'88 Turbocoupe would be better. Very fast spool-up and better throttle response. I auto-x an XR4Ti so I know how you feel, coming off the corners can be a PITA waiting on boost but at least you have a T-5 and can shift better than my old T-9!
i wouldn't go to an ihi for the reason that they do top out at 18psi and the t3 you have is good to 22psi or so. i have raced my car a few times on the road course at sir and most the time you can keep it under boost at all time so lag isn't really there but the extra lbs of boost will let you get/pass others on the straights

Quote:Originally posted by 85SVO-c-prep:

Would I see any change with going to a larger injector?

I am truly at a loss and dont know what to do. I love the car as it is but I, like most everyone else, would like it to go faster and handle better.
the larger injectors would help so you won't lean out when pushing it on the straights at full boost for sure. bigger tbody? for quicker throttle response (note i did not say hp gains, jury is still out on that one)
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#5

I think you have a pretty good setup.

About only thing I might do is have exhaust manifold and turbo exhuast side Jet Hot coated to retasin the heat. This will keep pressure up and should help reduce turbo lag.
85 Mustang Coupe, 3.3L I-6 done. Needs rebuilt T5 and T3 turbo.
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#6

Quote:Originally posted by dug:
good idea about the IHI cause it spools faster but dont they get inefficient past 18psi? and im assuming your running more than 18psi as of right now correct? so maybe a hybrid? i dont know much about them. do they spool any faster? and what exactly is a hybrid?
T3/T4 = hybrid. Uses the T3's exhaust housing (smaller) and the T4's compressor housing (larger). The smaller exhaust side allows the turbo to spool quickly, and the T4 compressor allows for greater airflow. So you have a turbo that spools like a T3, but flows air like a T4. I'd imagine that with the larger/heavier T4 compressor wheel it would spool slightly slower than a straight T3 setup, but once it's spooled, the gains of the T4 compressor would make up for it.

For your next upgrade, if you don't already have one, get an adjustable cam gear. You can advance it a couple of degrees to move your powerband lower in the RPMs. That should help on tight autox courses.
86 Mustang SVO - Sold long ago
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#7

I do have an adjustable cam gear, just forgot to list it. However, I have the one that requires you to remove the cam center bolt to adjust. What I really want is the kind with three small bolts on the gear itself so I can cut a few minutes out of the timing change.
85 C-Prep,3" ex,P&P Big valve, svo+ computer,2" drop,p-bushings, NPR, cold air,3.55/8.8 rear,BIG sway bar, strut bar.
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#8

How about a torque arm setup? I bet you have plenty of power, especially for AX. I would work on getting it to handle better. Maybe some new wheels and slicks as well.

I would also suggest an EEC-Tuner to maximize what you have.....would allow you to go to larger injectors with much more ease as well.

Mike
Tired of single digit LS Turbo cars, came back to TurboFord!
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#9

He is auto-xing (Solo II) not road course racing. Even in Solo I time trials there are no other cars on the course. There is no need to pass anyone, he is the only one on the track. It is vitally important to have excellent throttle response for auto cross. I have a T4(.57 trim)/T3(.63 A/R) on my "fast" XR and it is a crappy auto-x car--boost doesn't come up until 3000 rpm+ and when it does HOLD ON! This is not what you want when you are auto-xing. Smooth, reliable power that doesn't overwhelm the chassis. Smooth=Fast. More power does not mean faster lap times.
Ohio State Buckeyes 2002 National Champions
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#10

After brown tops which injectors would I go to that would still work with the stock computer. A torque arm is on my short list when funds permit. I have no idea what injectors to go with next or how much they would cost.

On another note. I hear some talk about a T-rex inline pump and the 255 in tank that I have. Is this something I should look into a little more as time progresses?

Eric
85 C-Prep,3" ex,P&P Big valve, svo+ computer,2" drop,p-bushings, NPR, cold air,3.55/8.8 rear,BIG sway bar, strut bar.
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