von

Ok its a thrashed 87 but with J-Spec 88 engine, turbo , wiring harness and ECU...
MODS----TB mod, stock exaust, cone filter, S-AFC , AVCR (apexi) FCD and blowoff valve. Im buying it for 800. He claims he ran a 13.1 at 13psi or 1bar in all gears. He has a 45percent duty cycle on the injectors and the AFC has around 20-38 percent plus at certain points.
IS THIS POSSIBLE TO DO ON A BASICALLY STOCK TURBO.

My other ? was 13psi is max right for stock turbo right, so wouldnt I need bigger injectors for running a 13.1 or is the AFC AND VAFC good enough. Something doesnot sound tuned right to me? Everything was dyno tuned and he got 213 at the wheelz.

My next ? is Whats the Difference between J-Spec 88 and normal 87 engines...Mabey the wastgate or exaust manifolds. Turbo mabey? PLEASE TRY AND ANSEWER SOME OF MY ?s IF U KNOW. THNX AND I APRECIATE IT...

Ranzo

I dunno but seems like somehting is wierd here. Only 45% inj duy cyle when boosting 13psi? and there is a 20-38% increase at some points. Ok whatever none of that really matters at this point I guess.

Does the car run? Did you drive it?

As far as engines they are same except for the normal J-spec differences. My guess is he installed the engine with the engine harness that came with it hence the 88 jspec harness.

If the car runs ok and nothing is obviously screwed up and you are comfortable with the money then get it. You can always come here if you have and problems right.

NZConvertible

13psi isn’t quite 1bar (which is 14.5psi). That sounds a bit too quick for a stock turbo and stock exhaust. Again, that sounds like a bit much power (~250fwhp) for a stock turbo and stock exhaust. And the stock turbo shouldn’t be taken past ~10psi. If He’s been running 13psi for a while, I don’t think it’ll last much longer. There’s no difference between the 87 and 8 motors, none at all.

Felix Wankel

Just the injectors and wiring harness, but nothing on the engine itself.

von

Then whats the diff between the J-SPEC...thiers got to be more power on the J-SPEC right?...

Motor lasted him 66k miles like this. He raced it all the time he said and engine just started smoking a month ago at idle sometimes.

I read the FC3S-Pro site and said that 14psi max on the stock turbo. he has 13 with boost controller S-AFC and AVCR wich is what was recomended for 14psi. I think hes good with the Fuel because the stock system handles 230 at the wheelz. I just dont see how he can get 13.1 with 243 some odd hp or a compressor upgrade...?

91REX

Von, did you ask him about the payments or what? And answer your phone you piece of monkey ****.

von

Lol...im at my sisters foo. Then im going to via rancho parkway to see Venessa at the mall. Im leaving at 930 so u can meat me if u want. Anyways I gave him 250 and I can take the car whenever I want but didnt have anyone to drive with. i will make 2 more payments of 250 for two weeks. He has 90 percent tire tred left, 1k on brand new clutch.. New alternator. Silicone vacume hoses , Blowoff valve , tb mod and something else.

von

I saw his avcr set at 1 bar...Oh. He also has three new indigo gauges. Boost , presssure and A/F ratio...

619-886-7548.

von

I mean dont get me wrong the car is a piece of ****. Interior is thrashed and engine is only decent but everything checked out fine. The only problem is slight smoking at idle. Hes taking the AVCR boost controller out and thats it. but the S-AFC is 400 bucks alone.

91REX-He has an aluminum t11 hood on it...hehe.

91REX

Yeah call me before you go and Ill meet you.
Tell me when you wanyt to pick the car and ill go too.

Felix Wankel

The fact that its from JAPAN...

RETed

NO.


-Ted

von

well if hes boosting at 14.5 then 13.1 is believable but I cant imagine the pain the engine was going threw.

von

WHAT...he said the reason he went J-SPEC is for the power difference.

NZConvertible

NO! They’re rated at exactly the same power. Minor emission controls is the only diference.That’s because the turbo’s oil seals are nearly dead from running too much boost...That’s funny, Ted usually says 10psi. Anyway, there’s hardly any more performance past 10psi on the stock turbo, just lots more heat.Me neither...

RETed

13.1 is possible - it's a bit quick, but ET doesn't mean anything.&nbsp Happen to get the MPH through the traps?&nbsp That gives you the equation to power output.

I'm a bit confused on the duty cycle thing.&nbsp Are you talking about absolute duty cyle or adjusted duty cycle?&nbsp At 13psi, the stock ECU outputs over 75% duty cycle - stock fuel injectors right?


The turbo will take up to 15psi regularly, IMO - other will argue it can handle more.&nbsp If you're running over 12psi, the pulsewidths get pretty high - I would suggest larger fuel injectors and jack down the pulsewidths.&nbsp If the car really put down 213 to the wheels, 13.1 is next to impossible, unless he was running slicks.

It's all the same except for the deletion of some emission components.&nbsp Compression ratio is the same.&nbsp Internals are the same.&nbsp The turbo is the same with the exception of the twin-scool actuator being flipped around - this does not change performance.


-Ted

91REX

Khliff, are you going to call me? Whats up with 2nite.

von

I think the 45percent duty cycle is 45percent over stock wich also doesnot make sense. That means that hes pushing 100 percent but he says he doesent have any flooding probs and injectors are fine.

RETed

So you're telling me the U.S.-spec 13BT's are NOT from Japan?


-Ted

RETed

He is misinformed.


-Ted

RETed

I have never said that.
When it comes to the stock stuffs, I'm more of a daredevil.
I have regularly run up to 15psi on the stock turbo and stock IC.
I don't recommend people do this, but I've got no problem if you do...



-Ted

von

Well its stock fuel system and I had no Idea it can handle 13psi. Thats a reliefe. only 75 percent , then thats pretty good. I dont know what color smoke it is. Havent actually seen it. Anyways the AVCR says 45 percent thats all I know. I dont know what setting field I was in. Adjustments or Gauges. Im sure it was adjusted. 213 at the wheelz. Mabey that was before he boosted to 13 , who knows.

The A/F gauge reads rich at idle and stoic (high green at WOT. Thats pretty good if u ask me.

I guess the stock exaust is keeping it from boost spiking so no probs thier. If 13.1 is possible then why the hell did u say thiers not much power past 10psi. 10 psi is nothing close to 13.1 am I right? Excuse my ignorance ..

von

Well its stock fuel system and I had no Idea it can handle 13psi. Thats a reliefe. only 75 percent , then thats pretty good. I dont know what color smoke it is. Havent actually seen it. Anyways the AVCR says 45 percent thats all I know. I dont know what setting field I was in. Adjustments or Gauges. Im sure it was adjusted. 213 at the wheelz. Mabey that was before he boosted to 13 , who knows.

The A/F gauge reads rich at idle and stoic (high green at WOT. Thats pretty good if u ask me.

I guess the stock exaust is keeping it from boost spiking so no probs thier. If 13.1 is possible then why the hell did u say thiers not much power past 10psi. 10 psi is nothing close to 13.1 am I right? Excuse my ignorance ..

NZConvertible

Oops, my bad!
I keep hearing on this forum (and other sources) that peak compressor efficiency is around 10psi and it all goes downhill rapidly after that. A lot more heat for not much more power, plus the bearings and seals cop a hiding.

NZConvertible

No, it’s not! It should be slightly lean at idle and RICH at WOT. Stoichiometric at WOT is far too lean, I can’t believe it’s not dead already!I said “not much more power past 10psi.” The turbo is running in an area of its compressor map where efficiency is low. That 3psi extra boost comes with a lot of extra heat, which could lead to detonation, especially with the stock IC.