What kinds of gains did you gain from a straight drop-in with the same settings for fuel and cam gears, and after tuning?

Also, I'm estimating that the only tuning needed going from b's to c's would be ~6k+rpms... Idle, and low end should be roughly the same, right? (just comparing specs)

Anyone?

 

Noooo... not spec C's. j/k

You're gonna murder us with spec C's (not that you aren't killing us already.)

 

I am doing an LS/VTEC right now and looking for cams. I was going to get the TODA Spec B's, but how streetable are the Spec C's? This is my daily driver. Thanks!

 

Chat (TodaSi) was making like 196hp with spec B's and a Mugne header. Then he switched to a TODA header and spec C's. His power jumped to 210hp. Hope that helps.



[Modified by Blade, 3:37 PM 1/24/2002]

 

Here is his graph between those changes.(linked from Godspeed's site)

 

Do it, and give your B's to me

 

The spec C's have the same primary lobe as the B's just a higher crossover will be required (larger secondary lobes).


[Modified by alexboy, 8:56 PM 1/24/2002]

 

what do C's cost for my car?

 

I'm contemplating switching to C's as well...

 

You will also need a bigger injector for Spec C, that mean probably a new ECU program and A LOT of dyno time!!

 

KenE~

I wouldn't be surprised if you lost a bit of power switching to C's with your current set-up. Due to the longer duration, your dynamic compression would drop even further without increasing your current static compression. As Mafay said, fuel will become a BIG issue. This would mean looking at your options and choosing a route; ie. bigger pump/increased fuel pressure/bigger injectors. At this point a good stand-alone is probably recommended as well. In my opinion, not a small jump...but then again, I've already been there & back.

 

Jeez Loueeze, Ken. You had the spec Bs in your car for, what, 6 months at the most? Spec Cs already? Looks like we're losing another brother on the eternal search for the Holy Grail of more whp!

 

Chris, I've thought about that... But I'm willing to give it a shot since nobody can tell me really what their experience has been. I suspect that the slight increase in lift and duration might not be so bad...

Mafay, I know that the c's will need bigger injectors and upgraded fuel pump/ fuel management, etc to get the most out of them. I suspect also that you can get by on the stock fuel delivery with fp riser/ regulator, and vafc. Maybe prelude injectors... Get by, but not get the most out of them. Long term plans will of course call for higher compression, which is also a basic requirement to get the most out of them. I'm wondering whether I should put it off and do everything at once... But I'm also curious by nature, and the "what if?" in me says that it will be interesting to see what a stock block itr will do with spec c's... I suspect 190whp is possible on stock compression... At this point, I suspect 190whp from spec b's is possible on stock compression...

Sean (Cosworth) and Casey (Neo), we all know that autox is pretty much driver - I could be in an nsx and post worse times than you guys. I won't say it's a never-ending search for whp, but the goal for this car is between 220-240whp... I dunno how attainable this is, but we'll see... In the meantime, the short-term goal is 200+whp, and I intend to be there this year. If the c's won't cause me too much of a loss, then it's worth it to me in upgrading soon. Eventually I will get c's, so why put it off, y'know?

Yeah, I know Chad's (todaSi's) results were favorable but he also had a healthy dose of compression. Those figures don't tell the whole story either... Chad.

Someone else with an itr went from b's to c's too... How did that fare?

 

so that you'll have some cash to go to some road courses

 

What compression pistons would be recommended for use with the spec b's? how about the c's? i was planning on 10.5:1 to stay a little flexible... but considered jumping as high as 12:1 and spraying one day. what are you opinions?

 

Boy dont I love this thread......

I'm running 11.8 compression and am soooo close to switrching to C's.....

I also am aware of the hidden costs of C's, like valvesprings, the requirement of bigger fuel pumps and injectors, dyno tuning etc etc.....maybe i should wait to do some major engine revamping before switching to Cs....ahem hint 2.0L block and rev to 9500 like LiP?

 

I think you should keep what you have and fine tune what you already have. Why you don't you try Hondata, and maybe go to a thinner headgasket. All Spec C's will do is make power at a much higher redline. I thought most of you Autoxer's don't usually spend that much time at 9000 and above. Thought you Xer's liked midrange power...

I'm sure there are other things you can do to your car that will make a more noticeable difference. Just my .02

 

Omg, I've been labeled as an "autoxer!"

j/k

Lol, actually I like to race. Period. I don't care if I have to get my fix around cones, on the road course, or at the drag strip. So my car does all of these things and street duty to boot.

As far as what I want: more power EVERYWHERE in the rpm band. Sure I don't rev to 10k all the time, but if I'm in that situation and don't want to have to lose time by shifting up - then I'll take it there. Of course, I don't want to only have power at 9k+ so that's why I like the toda cams. I don't care if I drop in the spec c's and lose ~5whp across the board. I gained nothing when I first dropped the b's in. Is it worth it to me? Yes. Because eventually I know I'll gain that 5whp and more back across the board and have higher potential too...

Are there other things I can do to make my car noticeably faster? Yes. Those topics were and will be covered in other threads.

 

Did I hear my name?

That's my dyno. Only differences were, header Mugen->Toda, Spec B cams -> Spec Cs, same ECU program, different day, same dyno, a few more miles (2500 or so) on the car. Oh yea, Spec B cam runs were with cam gears tuned, Spec C cam runs were with the gears @ 0,0.

 

I have a friend who is selling his Type R Toda Spec C cams~used for about 500 miles...asking for $1000 *shipped* (do NOT come with springs though). Email me if interested.

 

Yeah I remember trading IM's with you a while back. on that dyno graph. It looks like you gained 13whp peak and decent gains from 6k and up.

That's all I needed to know.

 

Ken,
I agree with the post above. You also ought to think about spending that money on your CURRENT setup. Pistons, head gasket, fuel control (something better than a VAFC), more tuning...when you are ready to get rid of the B's, let me know.