my buddy has a 96 civic with the greddy kit. He just dynoed it on a dynojet locally. i think his numbers are super low. He says it's his exhaust thats holding him up. What do you all think? What do you think is holding his numbers back so far

96 Civic EX D16Y8. Greddy 92-95 kit using the blue box and stock injectors set at 7psi. Has 1g dsm sidemount intercooler and a Skunk 2 intake manifold. Has stock exhaust. Using stock 14 inch wheels

 

Looks like your friend needs a bigger turbo

 

wow thats pretty sad. its gotta be the restrictive exhaust. do u know what the a/f was???

 

it should at least get 180 whp... ??? but his exhaust do not help him... at 7 psi the blue box should be fine... not the best he could have but ok... I cant believe that peoples buy turbo kit before an exhaust system ???

 

Those numbers are damn low. He's not even breaking 150whp. Something is holding him up, and I bet it is the stock exhaust.

Have him go back to the dyno, and run it open DP...or just do a butt dyno. I bet there will be quite a difference you can easily feel between open DP and stock exhaust with his setup.

 

If its running 7psi now and he takes the exhuast off, I'll bet it'll go up about 3psi without changing anything on the wastegate, mine did...

My stock 1'' DX exhuast didn't stop my ghetto civic from running 14.6@94mph ( best run of the day, and only run of the day ), with a slipping stock style clutch, BFG comp. TAs, 10psi, AFC hack, low compression 8.4/1, and TD04L-13T ( technily smaller than the greddy's 15G, but that's not the total pictures ). Full street weight and trim ( tools in the back seat, extra oil, jackets, totally full tank of gas ).

My set-up isn't the point.... the point is the car SHOULD MAKE AT LEAST 150whp ( more like 160whp ) with stock exhuast...

I say its the blue box... Yes they get the job done, but tuning is everything, and he has nothing....

My car I'm sure is making 160whp ( AT LEAST !!, ghetto and all )...

 

first off put the right kit for the car. y8 motor with z6 kit. but those numbers are mad low thats like stock rate hp

 

the pea shooter exhaust is a serious problem!

 

I would buy some better form of fuel management or at least a bigger intercooler b4 a skunk2 IM.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jdm Ek Hatch &raquo;</TD></TR><TR><TD CLASS="quote">first off put the right kit for the car. y8 motor with z6 kit. but those numbers are mad low thats like stock rate hp</TD></TR></TABLE>

wow, so smart.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civicekboost &raquo;</TD></TR><TR><TD CLASS="quote">Looks like your friend needs a bigger turbo</TD></TR></TABLE>

sigh....

 

Those are scary low HP numbers.

My N/A D16Y8 was putting down 126whp. CAI/Edelbrock IM/DC 4-2-1/2.5" Catback.

I'd do the following:
Change the plugs and plug wires.
Change the dizzy cap.
Change the oil
Check the timing maybe even retard it a little(knock sensors are a bitch)
And unbolt that SOB at the back of the Catalytic Converter and hop on the dyno again.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jdm Ek Hatch &raquo;</TD></TR><TR><TD CLASS="quote">first off put the right kit for the car. y8 motor with z6 kit. but those numbers are mad low thats like stock rate hp</TD></TR></TABLE>

You're OBVIOUSLY in the wrong forum if you aren't kidding. That post is beyond stupid.

 

Run Open Downpipe. When your at the track, your probably gonna run open downpipe or some sort of variation of this, and if your not, re think that decision. Everything off all the way to the downpipe, we've even run this on sevearl N/A cars and gained hp over the entire powerband(ie: d16z6 stock, bolt ons, made 120whp no exhaust, average is 108 w. exhaust.) He'll get a greater spool time, and a more accurate reading of his power. Exhaust is not only restrictive it destroy's your turbo slowly. If he's running the stock Greddy engine manegemant frmo the kit with a skunk2 intake manifold, he's probably going to need to add fuel to compensate for the increase volume of air the less restrictive manifold provides. The intercooler also worries me, is it actually mounted on the side look into the temperatures of the air entering his engine, even small temperature differences can make annoying changes in your horsepower.

 

how many miles are on the car. stock compression.

the cat is prolly clogged to ****. get rid of the cat and get a bigger exhaust.

go back to the dyno and unbolt the exhaust and see what happens.

the blue box does blow, but it should be good for better then that

platinum.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 89dxhunchback &raquo;</TD></TR><TR><TD CLASS="quote">If its running 7psi now and he takes the exhuast off, I'll bet it'll go up about 3psi without changing anything on the wastegate, mine did...
( AT LEAST !!, ghetto and all )...</TD></TR></TABLE>

Hmmm, wouldn't the boost go down since there's less of a restriction?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IslandSi &raquo;</TD></TR><TR><TD CLASS="quote">

Hmmm, wouldn't the boost go down since there's less of a restriction? </TD></TR></TABLE>

No, less restriction=easier spool. When I first installed my turbo I was running stock exhaust and could barely spool 5 psi. Once I switched to a straight through cat and 2.5" exhaust I was able to spool all the way up to the 8psi that the wastegate was set to. The power increase was quite substantial as well.

As has already been said, try running open dp, and if that helps, problem solved, your buddy just needs a new exhaust.

 

It's the exhaust. You can clearly see the torque increasing steadily right up until the point that the stocker becomes a serious bottleneck. Then the torque starts to fall off as horsepower stays flat. There is no doubt about it. If you really think about it, assuming ~30hp drivetrain loss on a honda, that kit is only making 30hp @ 7psi. He's putting his stock #'s down, at the wheels. There's definately a problem. Start with the exhast, and if that doesn't fix it, then it has to be timing related.

Good luck.

 

His timing is at stock position
He has stock plugs
his compression hasn't been checked but he has low milage so...


Every time i try and suggest what he should do he gets all pissy with me and says i'm cocky now that i have a turbo. I'd give you his H-T screenname so you could all talk to him and tell him whats up but he isn't registered.

To prove how retarded he is he has just ordered the thermal exhaust which is 2.5 inch. I told him that i'd go with custom mandrel 3 inch. He said 2.5 inch is perfect for turbo whereas i told him he was a dumbass and that open downpipe is "perfect" for turbo. He also thought he could tune the blue box somehow. also instead of putting his boost and A/f gauge where he can see them, he put them in his glove box and put his monster tach on his dash.

 

holy crap...on 5.5 psi i made 150/140 and 8 psi i made 176/173 with an apexi kit on a y8 with just the hack and a 2.5" exhaust.

7-8 psi should be 170-180 whp, something's not right. I bet if he unbolts his exhaust at the downpipe it jumps 15-20 whp. BTW what size DP is he using?

Also a 2.5" exhaust is good enough for a sohc running less than 10ish psi, i never had a restriction with a 2.5" turboback on mine running 8-10 psi, but 3 is always optimal.

 

any one else notice the torque compared to the horsepower? are you sure thats the right dyno sheet? I mean the torque looks about right, but whats with the horsepower? Any mechanical explanation for that? Not to often the horses are matched with the torque on hondas. hmmmmmmmmmmm (scratchin my head)

 

run a compression test just to be sure. if/when that turns out to be okay, id say it would be exhaust related