Okay I am ready for boost...I have all Crower valvetrain, including Crower stage 2 turbo cams. Go the ARP head studs, ACT clutch and flywheel, OBD1 semi-closed deck block with Mahle pistons and Total Seal rings. Crower Econo Rods, new gaskets, the works....DSM injectors too...other than the fact that I can now redline at 9500 rpm, how much boost should I lay out to the engine...I'm thinking 7 for daily driving, and 13-15 at the track on race gas...what do you think?

 

I think you have a lot of reading ahead of you.

1) Boost pressure is not relative to horsepower.

2) DSM injectors peak out around 300whp.

3) Pray you can safely rev to 9500 without bottom end damage occuring. I hope you are planning on balancing the whole bottom end plus a few other things to counter the harmonic vibrations. Do the crower 2's even make power that high?

 

You bought all that ****, and got DSM injectors??

Did you bother getting the block sleeved for those pistons.... cuz you don't need to

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PrecisionH23a &raquo;</TD></TR><TR><TD CLASS="quote">I think you have a lot of reading ahead of you.

1) Boost pressure is not relative to horsepower.

2) DSM injectors peak out around 300whp.

3) Pray you can safely rev to 9500 without bottom end damage occuring. I hope you are planning on balancing the whole bottom end plus a few other things to counter the harmonic vibrations. Do the crower 2's even make power that high?</TD></TR></TABLE>

^
I'd sell those cams for some TYPE S ones or a good billet set those cams suck,pore casting.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dragline &raquo;</TD></TR><TR><TD CLASS="quote">
I'd sell those cams for some TYPE S ones or a good billet set those cams suck,pore casting.</TD></TR></TABLE>

Speaking from experience? I'm just trying to find out how many people have actually snapped them because of the material, and process they were made and not because they overtightened the caps. I don't think there's many like that out there.

 

I have snapped a set and I know about 5 people that have snapped then.just do a search on here.

Once you have a broken set in your hands you can see what a shitty casting it really is.

 

In your case, when did they snap? What RPM range? Caps torqued to spec? Did you buy them brand new? Did Crower do anything about it? Any info appreciated. I'm planning on making over 600whp eventually and I got those cams.

 

Ya they were brand new they were torqued to spec.
It was probably at about 8000 rpm's in the middle of a race.
The motor was only making 440 hp to the wheels,so if your shooting for 600 I would get a billet cam.

Rule of thumb: If you have any doubt about the parts your going to use are not sufficient for what your doing,don't use them.

In some cases crower will replace them but they won't replace your bend valves..


Modified by dragline at 11:41 AM 3/25/2005


Modified by dragline at 11:42 AM 3/25/2005

 

how is your block semiclosed obd1 block i don't follow?

 

Its not like the 97-01 h22 blocks in that it almost looks like a DSM block, and therefore is semi-closed.

 

I don't think you're going to be revving to 9500rpm. Unfortunately, you would be lucky to even get your H-series tranny to shift above 8500rpms. Your other stuff looks good, but the DSM injectors aren't going to be sufficient for the HP you want at 13-15psi unless you're running a small turbo (t25/t28) and keep things under 300. Let us know how the Mahle pistons work out.

 

You should buy my turbo setup and you'd be set

 

Loose the DSM's, I wouldnt trust all that money/investment on a set of cheap used injectors. I bought the 450cc correct inject injectors from Tunertoys, only 215 shipped...

 

no one noticed he's on stock sleeves

 

Mahle pistons dont require sleeving...thats the beauty of it.

 

i am new to the honda world but my brother has a 98 gst eclipse pushing 480 to 500 whp and based on my knowledge of dsm and turbos from helping him build his car when you do go to run boost i would suggest getting larger injectors if the hp is going to exceed 300-325 and i would also do your research when buying a turbo kit people blow motors because they go cheap in critical areas obviously you have built your internals so your on the right track, the t25 turbo (stock 2nd gen dsm) is a great turbo b/c it spools up quickly and can handle quite reliably up to 18 lbs of boost. just dont waste your money on a giant turbo because your not going to need it.

 

Yeah I am thinking T25, T3 is unecessary since I'll be running 14 psi max on race gas. Thanks for the info.

 

why isnt this post locked?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rfoster03 &raquo;</TD></TR><TR><TD CLASS="quote">Yeah I am thinking T25, T3 is unecessary since I'll be running 14 psi max on race gas. Thanks for the info.</TD></TR></TABLE>

Are you joking?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rfoster03 &raquo;</TD></TR><TR><TD CLASS="quote">Mahle pistons dont require sleeving...thats the beauty of it.</TD></TR></TABLE>
Good luck with that.

 

Okay, why do you think I'm joking about the 14psi. You have the bone stock motor not me. And yes, go to http://www.mahle.com and look at the pistons for the 92-96 Prelude. They are 8.8:1 comp and DO NOT require sleeving!

 

No, I mean joking about using a T25 and not needing a T3. You run 14psi on a T25 on a prelude motor and all you'll be doing is heating the air. Run some flow numbers and look at where you'll be (or rather where you won't be) in the efficiency range of a T25. If you want to use a cheap turbo, at least go for a 14b, but even that will not be big enough.....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rfoster03 &raquo;</TD></TR><TR><TD CLASS="quote">Mahle pistons dont require sleeving...thats the beauty of it.</TD></TR></TABLE>

Have you ever read anything on this forum? Next thread: "**** MY BLOCK BROKE HELP!!!!!!!!!!"

EDIT: Also, PrecisionH23 is right. Boost pressure doesnt equal hp. You could be at 8psi and have to pull so much timing that you're making less power than unboosted. You didn't tell us what CR pistons you're running, either.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rfoster03 &raquo;</TD></TR><TR><TD CLASS="quote">And yes, go to http://www.mahle.com and look at the pistons for the 92-96 Prelude. They are 8.8:1 comp and DO NOT require sleeving! </TD></TR></TABLE>
We're well aware of Mahle's claims. They're not the first to make that claim. Like I said, good luck with that.