Is it possible to make more power from a lower lobed cams? I have spec C's right now and only gained about 8 whp from my CTR's...would I make more using spec B's instead? Set up: LSVtec (daily driver) us itr pistons, .25 over, GSR head, skunk2 intake, 68mm TB, Toda spec C cams & valvesprings, ITR header, lightened flywheel, hondata stage 2. I'm pretty content with how my car runs though, power is good but I was dissappointed on the 8whp gain after spending $1500 bux for the spec C's plus install...didnt even hit 200 whp ... Maybe I need to find a better tuner in the Bay Area...

 

B's and C's have the same sized primary lobes, so mid range will be the same. I don't see w/ your set-up how there would be any reason to swap out the C's, although I also don't know what your compression is.

 

11.7 compression...before having the head shaven 10,000 and deck resurfaced after overheating a few months ago. I havent taken compression test yet after that...but I see where you're getting at. I need to work on my block to maximize the spec C's potential. But damn...$1500 bux and only 8 whp gain and lost 7 on torque

 

Is your head ported? Properly ported heads allow better use of the extra lift.

 

you name it, I've done it...except for bigger injectors and bigger valves. Still running stock 240's. I may upgrade to 310cc's if ever I decide to do the obd0-obd1 conversion.

 

You'll need bigger injectors.

Stock 240's max out at about 190whp with the pressure bumped up from what I've seen.

 

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rocket &raquo;</TD></TR><TR><TD CLASS="quote">You'll need bigger injectors.

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Absolutely

 

I've been looking for stock 4th gen prelude injectors (270) to replace my 240cc temporarily but no luck...No wonder on my last dyno, the a/f graph shows that motors leaning out pass 8500rpm. We tried to increase fuel pressure but didnt work...Thanks again fellas.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EF_LSVtec &raquo;</TD></TR><TR><TD CLASS="quote">I've been looking for stock 4th gen prelude injectors (270) to replace my 240cc temporarily but no luck...No wonder on my last dyno, the a/f graph shows that motors leaning out pass 8500rpm. We tried to increase fuel pressure but didnt work...Thanks again fellas.</TD></TR></TABLE>

your complaing about spending 1500 on cams and barely any gain and wanting to switch cams now, why dont you just go with RC310 the 1st time around, instead of having to turn around later to upgrade prelude ones, might be more expensive in the short run, but in the long run its cheaper , just do things right the 1st time around and you wont have them sorta problems

 

I thought they dont make 310cc (peak and hold)...do the math, new injectors 310cc ($275), obd0-1 conversion wire harness ($170), obd1 distributor ($200), obd1 ecu ($200)...yet another dyno-tuning ($185 per hour), reinstall of hondata to new ecu ($100). Compared to just getting a 4th gen prelude injectors for $100 to get me going for a couple of months til I put my funds together. Either way, I know I'll be throwing the prelude injectors down the tube...but I can always resell the old stuff. Who's the smart one now?

btw, I didnt say I'm switching cams, I merely wanted some input about cam

 

imo, you don't have enough compression to make the C's sing..

 

PLEASE tell me something's F**ked up with your car!!! I'm just putting Spec C's in the car with stock B18C5 block, milled head, and some other little goodies on top including hondata S200. I will be quite upset if I can only squeeze 8 whp out of these cams with RC 440s!

 

what was car dynoed before the spec C?...you have to understand that when I had CTR cams, the block and headwork matched perfectly and for a daily driver, 192 whp was all the block could produce...now that I have higher lobed cams, the head became kind of an overkill to the mid compression block...so if i can up the compression (displacement) then as everyone here says, I can give justice to the spec C's...

*but to make you feel better, I do have some wiring issues to fix. It seems that everytime I go for dynotuning, something goes wrong (blown fuse, ecu codes etc), either there's bad connection somewhere or pr3 non obd and hondata combo is not a good match..once I get it all fixed (converting to obd1) I'll post the results. Hopefully smoother idle and overall performance and at least 10 more whp.

 

The car dynoed I believe 165 before the cams. I just hope my compression is going to be high enough, I'm using the stock block, milled head with a thin mugen headgasket. I'll be anxious to see your new numbers!

 

YOu should get good results with 310 injectors. I 'm running my toda c with 440 tuned with hondata. Be careful of blowing your motor with those small injectors. My friend with toda c blew his motor because he was running 240 with stock fuel pressure. I warned him about that...................

 

thanx for the heads up...I'm almost half way in putting together my obd1 conversion.

 

keep the setup u have ..get some better pistons (also some nice rods) for more compression...u need 12:1 and get the head ported..go get the toda header..what exhaust do u have??? u need more flow with those cams mang with that more to ur system u should make like 220whp

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr.Integra &raquo;</TD></TR><TR><TD CLASS="quote">imo, you don't have enough compression to make the C's sing..</TD></TR></TABLE>

exactly, you'll make more power or just as much with the B's and that compression.

 

I wouldn't stop at 12:1 compression. Go for at least 13:1. Just make sure you check clearances.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TimoneX &raquo;</TD></TR><TR><TD CLASS="quote">I wouldn't stop at 12:1 compression. Go for at least 13:1. Just make sure you check clearances.</TD></TR></TABLE>

this is for a street setup...its already getting crazy..but 13:1 is too crazy..12:11 should be safe with 93 octane..over here in NJ we have 94 octane..too bad gas pricing is rising..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Project H22DC4 &raquo;</TD></TR><TR><TD CLASS="quote">

this is for a street setup...its already getting crazy..but 13:1 is too crazy..12:11 should be safe with 93 octane..over here in NJ we have 94 octane..too bad gas pricing is rising.. </TD></TR></TABLE>

I bet if you check dynamic compression on that motor w/ 12.1 static it ain't that high with those cams. I'm at 12.2 static w/ my motor, wish I went higher, and probably will after I exterminate my tranny gremlins.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Project H22DC4 &raquo;</TD></TR><TR><TD CLASS="quote">

this is for a street setup...its already getting crazy..but 13:1 is too crazy..12:11 should be safe with 93 octane..over here in NJ we have 94 octane..too bad gas pricing is rising.. </TD></TR></TABLE>

Agreed, 12.5 or so should be plenty.

 

Irvin, RC 310's and one more trip to Dsr, I'm sure you'll be around 205 or higher. Not to mention swapping out your jdm 4-1 for a sms or dtr header wouldn't hurt either.

 

do u have hondata..i didnt see that in ur mods list..if u dont..go tune ur **** some more...with a good tuner and 12:1 comp u should make 210 at least mang