could I run my p61 with b18c1 block , b17a head with stock cams, ported&polish, and having us ITR piston 11.75:1 or CTR piston at 12.5:1 CR, buy retarding timing and more octane... or I will need a crome or hondata ??

 

CTR pistons in that setup with ITR cams is asking for a blown motor. Stick with the ITR piston and tune with Crome, CromePro, neptune, AEM, etc.

Search PCT and you will find what you are looking for.

 

thx dude

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mar778c &raquo;</TD></TR><TR><TD CLASS="quote">CTR pistons in that setup with ITR cams is asking for a blown motor. Stick with the ITR piston and tune with Crome, CromePro, neptune, AEM, etc.

Search PCT and you will find what you are looking for.</TD></TR></TABLE>

uhh, you don't know what you're talking about dude. I've ran the B18c with CTR pistons and Skunk stage 3, Pro 2 AND Pro 3 cams. And these cams are WAAAY bigger than CTR cams-Neither of which I had piston to valve contact. I've run these different set-ups (CTR pistons with CTR cams, CTR pistons and the Skunk cams mentioned above) in 20-40min road races in '01-'06 (honda challenge, world challenge, US Touring car.

Depending on what combo you run, you'll see dyno #'s from 185whp up to 225whp. Personally, I've seen 221whp, 138ft/lbs with my B18c1, CTR pistons, skunk stg 3 cams, and chipped P-28 back in '05.

So to answer the original question to this post...yes you can run the B18c1, (B17) pr-3 head with CTR pistons. You'll need more than pump gas though.




Modified by vtecjj at 10:13 AM 2/25/2008

 

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

uhh, you don't know what you're talking about dude. I've ran the B18c with CTR pistons and Skunk stage 3, Pro 2 AND Pro 3 cams. And these cams are WAAAY bigger than CTR cams-Neither of which I had piston to valve contact. I've run these different set-ups (CTR pistons with CTR cams, CTR pistons and the Skunk cams mentioned above) in 20-40min road races in '01-'06 (honda challenge, world challenge, US Touring car.

</TD></TR></TABLE>

I don't think you understand. The problem is not piston to valve contact that has been done many times. The problem is pre-ignition (detonation) during every day driving. You realize that every cam you named has larger primaries and secondaries than a b16/b17 cam. This effectively bleeds compression, thus lower your dynamic compression and makes the motor a lot more resistant to detonation.

But, I guess you think its ok to run 12.5:1 static compression on those small primaries as a DD. I guess you think detonation is not a issue on 91-94 octane for a DD.

Your experience is with a race motor. I guess you ran those motors back in forth to work everyday. Only on HT do people think 12.5:1 static compression is ok for a DD.


Modified by mar778c at 8:47 AM 2/25/2008

 

maybe you'll have an issue with detonation or pre-ignition if you dont tune it correctly or dont have your head polished and completly remove all carbon in there. And my car is not gonna be a DD , it's gonna be a weekend driven car... properly tuned... really interesting post...

 

if I get my p61 chipped, will I still need race gas, or my timing gonna be far enough to stay safe (out of det. & pre)... what about plugs ?? and I could not even drove that thing to the dyno, I would need to get it towed and tuned there, unless I get it tuned at home with a nectune, crome, hondata etc... drove it to the dyno, and then get my fine tuning... anyway reply on this guys

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by todab17c &raquo;</TD></TR><TR><TD CLASS="quote">maybe you'll have an issue with detonation or pre-ignition if you dont tune it correctly or dont have your head polished and completly remove all carbon in there. And my car is not gonna be a DD , it's gonna be a weekend driven car... properly tuned... really interesting post...</TD></TR></TABLE>

On those small cams, you are going to have a issue no matter the driving conditions. You are going to have to pull more than a couple of degs to keep it from pinging. This is going to heat up the cylinder anyway. Unless you run some nice high octane, 102 or better, this motor is not going to last very long.

You can run high compression and low octane 91-94 if you have a big cam.

 

yep, I know what you mean... so if I get a set of stage 3 skunk2 or any other brands, even stg.2, it would help ?

 

I just need to get this thing chipped properly and run on 102+

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mar778c &raquo;</TD></TR><TR><TD CLASS="quote">
I don't think you understand. The problem is not piston to valve contact that has been done many times. The problem is pre-ignition (detonation) during every day driving. You realize that every cam you named has larger primaries and secondaries than a b16/b17 cam. This effectively bleeds compression, thus lower your dynamic compression and makes the motor a lot more resistant to detonation.

But, I guess you think its ok to run 12.5:1 static compression on those small primaries as a DD. I guess you think detonation is not a issue on 91-94 octane for a DD.

Your experience is with a race motor. I guess you ran those motors back in forth to work everyday. Only on HT do people think 12.5:1 static compression is ok for a DD.
Modified by mar778c at 8:47 AM 2/25/2008</TD></TR></TABLE>

Up until his (todab17c) his most recent post, (not even mentioned in your response to his original post) did he or you specify a DD. The question was asked by him if he could run the engine parts that he specified.

I explained that it was possible as I shared my experience AND I do DO think that detonation is an issue with 91-94 octane on a 12.5:1 engine thats why I noted that he would indeed need a higher octane than pump gas. And they were race engines-which were all used in races (as I stated)...not going to work everyday.
Leave it to ppl on HT to not completely read replies.
Incase you missed it-


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vtecjj &raquo;</TD></TR><TR><TD CLASS="quote">
I've ran the B18c with CTR pistons and Skunk stage 3, Pro 2 AND Pro 3 cams. And these cams are WAAAY bigger than CTR cams-Neither of which I had piston to valve contact. I've run these different set-ups (CTR pistons with CTR cams, CTR pistons and the Skunk cams mentioned above) in 20-40min road races in '01-'06 (honda challenge, world challenge, US Touring car.

Depending on what combo you run, you'll see dyno #'s from 185whp up to 225whp. Personally, I've seen 221whp, 138ft/lbs with my B18c1, CTR pistons, skunk stg 3 cams, and chipped P-28 back in '05.

So to answer the original question to this post...yes you can run the B18c1, (B17) pr-3 head with CTR pistons. You'll need more than pump gas though.
</TD></TR></TABLE>

Nowhere does it say DD....

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by todab17c &raquo;</TD></TR><TR><TD CLASS="quote">could I run my p61 with b18c1 block , b17a head with stock cams, ported&polish, and having us ITR piston 11.75:1 or CTR piston at 12.5:1 CR, buy retarding timing and more octane... or I will need a crome or hondata ?? </TD></TR></TABLE>


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mar778c &raquo;</TD></TR><TR><TD CLASS="quote">CTR pistons in that setup with ITR cams is asking for a blown motor. Stick with the ITR piston and tune with Crome, CromePro, neptune, AEM, etc.

Search PCT and you will find what you are looking for.</TD></TR></TABLE>

 

I dont really understand haha, but I had the information that I needed. thx

 

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

Up until his (todab17c) his most recent post, (not even mentioned in your response to his original post) did he or you specify a DD. The question was asked by him if he could run the engine parts that he specified.

I explained that it was possible as I shared my experience AND I do DO think that detonation is an issue with 91-94 octane on a 12.5:1 engine thats why I noted that he would indeed need a higher octane than pump gas. And they were race engines-which were all used in races (as I stated)...not going to work everyday.
Leave it to ppl on HT to not completely read replies.
Incase you missed it-


Nowhere does it say DD....

</TD></TR></TABLE>

Of course he could run that combination of parts. The question is would you want to? That small cam and high compression is a problem. Whether is it was DD or not.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by todab17c &raquo;</TD></TR><TR><TD CLASS="quote">could I run my p61 with b18c1 block , b17a head with stock cams, ported&polish, and having us ITR piston 11.75:1 or CTR piston at 12.5:1 CR, buy retarding timing and more octane... or I will need a crome or hondata ?? </TD></TR></TABLE>

He said stock cams not aftermarket. I guess that obvious fact was glossed over.

Since I missed this the 1st time,

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vtecjj &raquo;</TD></TR><TR><TD CLASS="quote">
uhh, you don't know what you're talking about dude. I've ran the B18c with CTR pistons and Skunk stage 3, Pro 2 AND Pro 3 cams. And these cams are WAAAY bigger than CTR cams-Neither of which I had piston to valve contact. I've run these different set-ups (CTR pistons with CTR cams, CTR pistons and the Skunk cams mentioned above) in 20-40min road races in '01-'06 (honda challenge, world challenge, US Touring car.

Depending on what combo you run, you'll see dyno #'s from 185whp up to 225whp. Personally, I've seen 221whp, 138ft/lbs with my B18c1, CTR pistons, skunk stg 3 cams, and chipped P-28 back in '05.

So to answer the original question to this post...yes you can run the B18c1, (B17) pr-3 head with CTR pistons. You'll need more than pump gas though.
</TD></TR></TABLE>

Where did you run a stock cam in that combo?

 

To the OP, a lot of people don't like the CTR's, personally I'm using .25 OS CTR's in my build (bore and hone) with ARP rod bolts (rods resized), and new oil pump, but plan on running the regular Stage2 Skunks for DD'ing, if you're going to DD that setup with CTR's, plan on using a 3-layer headgasket also for safe DD'ing. Also remember, tuning is VERY key in any setup, especially this one

 

yup. I said stock cams... because I was wondering if I could do that... but like your saying I cant so im gonna go get a set of cams, probably stage 2 or maybe 3 and get myself a good head gasket 3 layers..... then get that pr3 tuned... and should be good ??

 

are you running those in a b18c1 ??


st9vex


11:21 AM 2/25/2008

--------------------------------------------------------------------------------

To the OP, a lot of people don't like the CTR's, personally I'm using .25 OS CTR's in my build (bore and hone) with ARP rod bolts (rods resized), and new oil pump, but plan on running the regular Stage2 Skunks for DD'ing, if you're going to DD that setup with CTR's, plan on using a 3-layer headgasket also for safe DD'ing. Also remember, tuning is VERY key in any setup, especially this one