Camshaft Questions - ZR-1 Net Registry Forums

Jagdpanzer · 11-19-2009

Saw these camshafts listed on Ebay and was wondering what year motors have the single flate for the chain sprocket and is 230 duration and 0.415" lift considered stage 1 or stage 2?.

http://cgi.ebay.com/ebaymotors/Lt5-Z...item20ae1f5beb

Polo-1 · 11-19-2009

single flats 90-92
double flats 93-95

Reginds are stage1 up to 425 lift.
stage 2 are from blanks 440 lift.
stage 3 same 450/454 lift

Pete · 11-20-2009

Those are custom regrinds.

Here is some cam info.

Stock Cams
Intake .214 .229 .389 .389
Exhaust .214 .214 .389 .389

SGC
Stage I .228 .228 .415 .415
Stage II .237 .237 .440 .440
Stage III .242 .242 .450 .450

LPE
A Cams
Intake .221 .236 .399 .445
Exhaust .221 .221 .399 .399

B Cams
Intake .239 .239 .445 .445
Exhaust .221 .221 .399 .399

C Cams
Intake .239 .239 .445 .445
Exhaust .239 .239 .445 .445

If you buy those install just the Intakes with stock exhausts.
Those exhaust cams are way too big for that Intake cam,i like to see about 12 -15 degrees split between In/Ex.
i.e.
Intake .244 Exhaust .230
Intake .236 Exhaust .221
Intake .230 Exhaust .215

Also don't expect a whole lotta gains with that Intake.

I'm running Intake .236 .425 Exhaust .220 .425

Just my thoughts.
Pete

tpepmeie · 11-20-2009

Quote:

Originally Posted by Pete

C Cams
Intake .239 .239 .445 .445
Exhaust .239 .239 .445 .445

Pete,
I also have in my notes that LPE did some even bigger 244/.454 intakes. Could have been 246 even. I believe Paul Smith's ex-SW car had these puppies.

Todd

scholtmj · 11-20-2009

Quote:

Originally Posted by Pete

Those are custom regrinds.

Here is some cam info.

Stock Cams
Intake .214 .229 .389 .389
Exhaust .214 .214 .389 .389

SGC
Stage I .228 .228 .415 .415
Stage II .237 .237 .440 .440
Stage III .242 .242 .450 .450

LPE
A Cams
Intake .221 .236 .399 .445
Exhaust .221 .221 .399 .399

B Cams
Intake .239 .239 .445 .445
Exhaust .221 .221 .399 .399

C Cams
Intake .239 .239 .445 .445
Exhaust .239 .239 .445 .445

If you buy those install just the Intakes with stock exhausts.
Those exhaust cams are way too big for that Intake cam,i like to see about 12 -15 degrees split between In/Ex.
i.e.
Intake .244 Exhaust .230
Intake .236 Exhaust .221
Intake .230 Exhaust .215

Also don't expect a whole lotta gains with that Intake.

I'm running Intake .236 .425 Exhaust .220 .425

Just my thoughts.
Pete

Pete,
Ever consider writing a book?

Where did you get your cams or is that top secret?

-=Jeff=- · 11-20-2009

Quote:

Originally Posted by scholtmj

Pete,
Ever consider writing a book?

Where did you get your cams or is that top secret?

come down here for pizza sometime and you might find out..

scholtmj · 11-20-2009

Quote:

Originally Posted by -=Jeff=-

come down here for pizza sometime and you might find out..

Ha, deal. Next spring I'll be in need of a tune from Marc H, we can work something out.

scholtmj · 11-23-2009

so anyone buy these? I see they went for $500 at the last second.

11-19-2009	#1
Jagdpanzer Join Date: Apr 2007 Location: Northern VA Posts: 2,644	Camshaft Questions Saw these camshafts listed on Ebay and was wondering what year motors have the single flate for the chain sprocket and is 230 duration and 0.415" lift considered stage 1 or stage 2?. http://cgi.ebay.com/ebaymotors/Lt5-Z...item20ae1f5beb Last edited by Jagdpanzer; 11-19-2009 at 09:01 PM.

11-19-2009	#2
Polo-1 Join Date: Sep 2005 Location: Washington Posts: 955	Re: Camshaft Questions single flats 90-92 double flats 93-95 Reginds are stage1 up to 425 lift. stage 2 are from blanks 440 lift. stage 3 same 450/454 lift

11-20-2009	#3
Pete Join Date: Dec 2003 Location: Chicagoland,IL Posts: 2,680	Re: Camshaft Questions Those are custom regrinds. Here is some cam info. Stock Cams Intake .214 .229 .389 .389 Exhaust .214 .214 .389 .389 SGC Stage I .228 .228 .415 .415 Stage II .237 .237 .440 .440 Stage III .242 .242 .450 .450 LPE A Cams Intake .221 .236 .399 .445 Exhaust .221 .221 .399 .399 B Cams Intake .239 .239 .445 .445 Exhaust .221 .221 .399 .399 C Cams Intake .239 .239 .445 .445 Exhaust .239 .239 .445 .445 If you buy those install just the Intakes with stock exhausts. Those exhaust cams are way too big for that Intake cam,i like to see about 12 -15 degrees split between In/Ex. i.e. Intake .244 Exhaust .230 Intake .236 Exhaust .221 Intake .230 Exhaust .215 Also don't expect a whole lotta gains with that Intake. I'm running Intake .236 .425 Exhaust .220 .425 Just my thoughts. Pete __________________ '91 #1635 PoloGreen 350 LT5 11.09 @ 129.27 11.04 @ 128.86 474RWHP 400RWTQ http://www.youtube.com/watch?v=SFNFOhGGlR4 http://www.youtube.com/watch?v=ZlRIOMwaDYY https://sites.google.com/site/peteszr1garage

11-23-2009	#8
scholtmj Join Date: Nov 2008 Location: Grand Rapids, MI Posts: 384	Re: Camshaft Questions so anyone buy these? I see they went for $500 at the last second.