turbo to NA

[fn8uup]

how hard will it be to go from turbo to NA on a 92 laser

can i just put a NA header on and plug the oil lines or is the computer going to lean the A/F ratio out with no boost coming into the motor

whats the factory hp rating of this motor with the turbo

does the turbo head flow better than the NA or are they the same

also i would like to know if anyone makes a manual valve body for this car

in case your wondering this will be used to race on a 1/2 mile asphalt track(no turbos or superchargers) so if im going to use this car ive got to pull the turbo or find another car

 

[fn8uup]

ok ive found the answer to all my questions except if the factory computer will give me any problems once i remove the turbo

 

[BiGGinZ]

I know this isn't an answer to your question but, maybe you should just trade someone with a n/t laser, eclipse, or talon. I am sure you can trade them and get a little bit of cash too. The n/t people are always looking to upgrade to a turbo one. Then you have a little money to put into the n/t one that you get. Not really an answer to your question, but maybe that would work out better.

BiGGinZ

 

[Quasimondo]

how hard will it be to go from turbo to NA on a 92 laser

can i just put a NA header on and plug the oil lines or is the computer going to lean the A/F ratio out with no boost coming into the motor

whats the factory hp rating of this motor with the turbo

does the turbo head flow better than the NA or are they the same

also i would like to know if anyone makes a manual valve body for this car

in case your wondering this will be used to race on a 1/2 mile asphalt track(no turbos or superchargers) so if im going to use this car ive got to pull the turbo or find another car

You're probably better off finding another car. It's no problem to convert to n/a. It's just a matter of finding a header, plugging the line at the head, blocking the line at the oil pan (same goes for the coolant lines for the turbo). The heads are the same, and after looking at the Chilton's it appears that the cams are same as well. But the problem will be in the compression ratio. The n/t engines run a 9.0:1 CR, versus 7.8:1 for turbo engines, so if you just pull the turbo off and run it like that, it'll run slower than shit and perform worse than a n/t engine.

 

[marcmsj]

You're probably better off finding another car. It's no problem to convert to n/a. It's just a matter of finding a header, plugging the line at the head, blocking the line at the oil pan (same goes for the coolant lines for the turbo). The heads are the same, and after looking at the Chilton's it appears that the cams are same as well. But the problem will be in the compression ratio. The n/t engines run a 9.0:1 CR, versus 7.8:1 for turbo engines, so if you just pull the turbo off and run it like that, it'll run slower than shit and perform worse than a n/t engine.

he's correct... our turbo engines are not designed to be run without the turbo. you will make NO power whatsoever. you'll be able to see geo metros passing you on the highway.

if you want a nt dsm, just trade yours with one.

 

[beat90tsi]

Just take the WG actuator off of the flapper arm, instant NA DSM.

 

[marcmsj]

Just take the WG actuator off of the flapper arm, instant NA DSM.

incorrect... you'll still boost, it will just take longer.

 

[beat90tsi]

ok, i won't dispute that you'll build boost, but it won't be full, it will be pretty minimal

My evo3 which creeped to around 25 before porting, would run under 10 with the standard sized flapper arm disconnected.

 

[marcmsj]

ok, i won't dispute that you'll build boost, but it won't be full, it will be pretty minimal

My evo3 which creeped to around 25 before porting, would run under 10 with the standard sized flapper arm disconnected.

exactly...

minimal or not, it's still boosting and would disqualify him from the racing he wants to do.

 

[beat90tsi]

Sorry I should have read his entire post, I skimmed and missed the last line about racing. I thought maybe he just wanted to save some money and run 87.

 

[fn8uup]

thanks for the help but hopefully ill get a definate from someone here on weither or not the computer will have any problems


as for the compression ill just add some pistons its got 136k on it so it probably needs a lil tlc on the inside anyways

BTW im buying this off a impound lot so i have no title its a track only car so no trading

and if all else fails and i dont sell the motor itll make a good railbuggy motor(but that would be a last resort because id really like to race it)

 

[timloomis]

yea the computer will flood the crap out of the engine.it wont be fast at all b/c of the low compression and no turbo.just get a n/a car.

 

[marcmsj]

yea the computer will flood the crap out of the engine.it wont be fast at all b/c of the low compression and no turbo.just get a n/a car.

i don't think that would happen since the computer will supply the correct amount of fuel for the amount of air the maf is reading.. the computer should still be able to keep the fuel where it should be. someone correct me if i'm wrong.

 

[fn8uup]

im hopeing thats what will happen like for instance if the turbo went bad the computer could still function

so i guess the easiest way to find out is to remove the pice of intake that goes to the throttle body and run it up the road a few times and go from there

if anyone else has any input feel free to chime in

 

[herostar]

Easiest way to do this would be to just remove all the intercooler parts and just hook the intake directly up to the TB elbow. It's not turbocharged if the turbo isn't feeding the engine... you could at least run it like this to find out about how much power it'll have or until you get a n/a header. I'm sure someone would trade you a header for your manifold/turbo/o2 housing...

 

[marcmsj]

Easiest way to do this would be to just remove all the intercooler parts and just hook the intake directly up to the TB elbow. It's not turbocharged if the turbo isn't feeding the engine... you could at least run it like this to find out about how much power it'll have or until you get a n/a header. I'm sure someone would trade you a header for your manifold/turbo/o2 housing...

you're forgetting one crucial thing...

MAF

 

[timloomis]

just get a n/a dsm.if you just take off the turbo parts,youll be slow as hell.you wont even have 100 hp.your compression is too low to just take stuff off.

 

[herostar]

you're forgetting one crucial thing...

MAF

No, you use the turbo intake pipe and hook it up to the tb elbow, obviously leaving the maf in place b/c that's where the filter bolts on

 

[GSEclipse06]

i'll trade you my non-turbo, but its completely stock

 

[marcmsj]

No, you use the turbo intake pipe and hook it up to the tb elbow, obviously leaving the maf in place b/c that's where the filter bolts on

eh... fine


but there's still no point in doing that... it's gonna be slower then anything on the road... so forget about racing it.

 

[Nt-Eclipse-Dail]

You're probably better off finding another car. It's no problem to convert to n/a. It's just a matter of finding a header, plugging the line at the head, blocking the line at the oil pan (same goes for the coolant lines for the turbo). The heads are the same, and after looking at the Chilton's it appears that the cams are same as well. But the problem will be in the compression ratio. The n/t engines run a 9.0:1 CR, versus 7.8:1 for turbo engines, so if you just pull the turbo off and run it like that, it'll run slower than shit and perform worse than a n/t engine.

The cams are not the same and a .2 difference in compression ratio will "really make a big difference..."
You can have a bigger difference in compression ratios with a good amount of carbon build up on one engine (same type engine / different mileage). How many horsepower do you think you will get with .2 compression increase? Answer: Not many... You would need a DINO to measure it.

 

[1993eclipseGS]

Another turbo car down the drain. Oh, It'll be slower then a n/t car. Have fun with that.

 

[fn8uup]

i really doubt it will be slow the only thing stock on it will be the crank and block everything else will be aftermarket rods, high comp pistons, ported head, cams, titanium springs and retainers, stainless valves, new intake and throttle body, ect ,ect same for the trans almost nothing inside will be stock high stall converter manual valvebody blah blah blah


i just wanted to know how the computer is going to act with no turbo on it

 

[fn8uup]

tell ya what to put it as simply as possible does the computer take any kind of boost reference to make any adjustments to the air fuel ratio or the timing

if yes ill get a non turbo computer

if it only adjusts by what the maf tells it i think ill be ok

 

[1993eclipseGS]

What about the injectors? you'll have turbo injectors on a n/a motor. i would think the ecu would need to also be changed, Being it is for a turbo car.