PONTIAC ZONE TECH FORUMS
 

Go Back   PONTIAC ZONE TECH FORUMS >
Engine Tech
> Engine Tech Discussion - Street or Strip
User Name
Password

Reply
 
Thread Tools
Old 09-20-07, 08:28PM   #1
Gach
Administrator
 
Gach's Avatar
 
Join Date: May 2003
Location: ....
Posts: 12,879
Default Len Caverly *Engine Masters Challenge*

Has anyone received the latest issue of PHR, there's a really good
article about his entry. 434 CI Pontiac made 655 HP at 6000 rpms
He used a set of KRE High Port heads, said they flowed 335 cfm out
of the box. Len did the port work himself when he was done they
measured 2.50 tall and 1.310 wide. Says he used epoxy to reshape
the ports around the valve guides and pick up 3-5 cfm when he was
done they flowed .400 325/228 at .500 355/251 and at .600 and
370/265 at .700. No port volume numbers mention in the article.

PS: In one of the pictures you can clearly see he used off set
rockers, he relocated the rocker studs, I assume he used off
set lifter too, but it's hard to tell from the pictures.
Gach is offline   Reply With Quote
Old 09-21-07, 10:33AM   #2
hectore3
Registered User
 
Join Date: Nov 2005
Location: yazoo city,ms
Posts: 118
Default

Yes I have an excellent showing by Len. He happens to live down the road from me in New hampshire. He and his sons are great people. Helped me out to custom design a roller cam going into my 428. Thanks Len!
hectore3 is offline   Reply With Quote
Old 09-21-07, 11:44AM   #3
INJUNTOM
 
Posts: n/a
Default

Always good to see him in the challenge.

I suppose Kaase will be going Ford this year?
  Reply With Quote
Old 09-21-07, 09:31PM   #4
Gach
Administrator
 
Gach's Avatar
 
Join Date: May 2003
Location: ....
Posts: 12,879
Default

Quote:
Originally Posted by hectore3 View Post
Yes I have an excellent showing by Len. He happens to live down the road from me in New hampshire. He and his sons are great people. Helped me out to custom design a roller cam going into my 428. Thanks Len!
Len use to be on this board on a regular bases, we use to get into it
about running 11.1 compression on pump gas. He's a smart guy I really
enjoyed having him around, a guy you could kid with and not take it
seriously. Once he got busy with the Engine Challenge he stopped coming
around.
Gach is offline   Reply With Quote
Old 09-22-07, 09:20AM   #5
BDHABT
Registered User
 
BDHABT's Avatar
 
Join Date: Nov 2005
Location: Plainville,CT
Posts: 270
Thumbs up

Back in the spring,I met Lenny up in New Hampshire.His buddy Jeff rebuilt my Dominator,and when I brought the car up for Jeff to tune,Lenny was there.
They are both very laid back,and share a wealth of Pontiac knowledge.
They bounced ideas off each other,and when they were done tinkering,there was a big difference in how the car performed.

Mark.
BDHABT is offline   Reply With Quote
Old 09-22-07, 07:53PM   #6
Gach
Administrator
 
Gach's Avatar
 
Join Date: May 2003
Location: ....
Posts: 12,879
Default

Guys like Lenny are getting harder and harder to fine. If you talk to
him tell him Gach said hello.
Gach is offline   Reply With Quote
Old 09-23-07, 04:17PM   #7
hectore3
Registered User
 
Join Date: Nov 2005
Location: yazoo city,ms
Posts: 118
Default

Quote:
Originally Posted by Gach View Post
Len use to be on this board on a regular bases, we use to get into it
about running 11.1 compression on pump gas. He's a smart guy I really
enjoyed having him around, a guy you could kid with and not take it
seriously. Once he got busy with the Engine Challenge he stopped coming
around.
Funny you say that about the high compression pump gas engines. Because they convinced to do the same in my 428. I'll see how well it works out.

I'll also tell Lenny you said hi Gach. He lives 15 minutes away from my parents house.
hectore3 is offline   Reply With Quote
Old 09-23-07, 04:37PM   #8
Gach
Administrator
 
Gach's Avatar
 
Join Date: May 2003
Location: ....
Posts: 12,879
Default

Here's what I've experienced, with a iron head's the amount of
compression you can run is more dependent on stroke. I've
built all three 400, 428 and 455. On our 400 motor we ran 10.75
compression never any problems running pump gas. Same thing
with a 428. 375 stroke on the 400 and 4.00" stroke on the 428.
On the 455 which has 4.210 stroke it was a different story,
detonation with 10.1 compression.

When you build a motor for some one, and your not there to tune
it, see what it's doing' control the type of gas they put into, it can
be a nightmare. I myself could probably get away with running
10.1 on a 455. But for my buddy I had to drope the compression
down to 9.50 a good safe amount.

Now if you go to aluminum head it's a whole different ball game.
You can run 11.1 on a 455 mybe even more. On a iron head 455
You have to have the right cam, that bleeds off compression at
the right time. They change the flash rate on gas for the winter
months, that's when guys get into trouble. I like the 428 because
of the stroke.
Gach is offline   Reply With Quote
Old 09-23-07, 07:35PM   #9
tjs44
Ram Air V Guru
 
Join Date: Jul 2002
Location: long beach,california
Posts: 1,210
Default

Lou,FYI,for guys that build pontiac street motors and need to gurantee their work,some like Dave a SD will hold iron heads to 9.25 and alu heads to 10.25.With the increasing amount of piss gas that is being sold to us now,he feels thats the safe limit.Tom
tjs44 is online now   Reply With Quote
Old 09-23-07, 07:48PM   #10
Gach
Administrator
 
Gach's Avatar
 
Join Date: May 2003
Location: ....
Posts: 12,879
Default

Smart man, I would never build anyone a 455 with more then 9.25
especially with iron heads, learn me lessen the hard way. I hear it
all the time, from guys who build motor on the edge of compression'
oh he most had gotten a bad patch of gas, after the guys put a
quarter size hole in his piston. Your right about the gas, who knows
what your getting today. So far I've found Hess to be about the best.
Gach is offline   Reply With Quote
Old 09-28-07, 01:04AM   #11
hectore3
Registered User
 
Join Date: Nov 2005
Location: yazoo city,ms
Posts: 118
Default

Quote:
Originally Posted by Gach View Post
Here's what I've experienced, with a iron head's the amount of
compression you can run is more dependent on stroke. I've
built all three 400, 428 and 455. On our 400 motor we ran 10.75
compression never any problems running pump gas. Same thing
with a 428. 375 stroke on the 400 and 4.00" stroke on the 428.
On the 455 which has 4.210 stroke it was a different story,
detonation with 10.1 compression.

When you build a motor for some one, and your not there to tune
it, see what it's doing' control the type of gas they put into, it can
be a nightmare. I myself could probably get away with running
10.1 on a 455. But for my buddy I had to drope the compression
down to 9.50 a good safe amount.

Now if you go to aluminum head it's a whole different ball game.
You can run 11.1 on a 455 mybe even more. On a iron head 455
You have to have the right cam, that bleeds off compression at
the right time. They change the flash rate on gas for the winter
months, that's when guys get into trouble. I like the 428 because
of the stroke.


That's what I worry about some. But ya only live once. Its going to be an E-head aluminum 72cc,Comp Cams Hydraulic roller camshaft 248/254 at .050,.638 lift with a 1.65 rocker,and 112 lobe sep should be around 11.4 compression. Going to run an aluminum radiator and a oil cooler(with thermostat) to control temps. The 428 will be going into a 67' Tyrol blue Lemans hardtop coupe.


Any guess on power? I was thinking conservative 490HP or so at the crank?

Last edited by hectore3 : 09-28-07 at 01:07AM. Reason: spelling
hectore3 is offline   Reply With Quote
Old 09-28-07, 11:12AM   #12
Gach
Administrator
 
Gach's Avatar
 
Join Date: May 2003
Location: ....
Posts: 12,879
Default

I don't see that 11.4 compression being a problem with E-heads
I just dyno mine with 11.1 compression and no signs of detonation.
Gach is offline   Reply With Quote
Old 09-28-07, 03:29PM   #13
Pontiac Dude
Engine Builder
 
Pontiac Dude's Avatar
 
Join Date: Aug 2002
Location: Brooksville, Fl
Posts: 1,532
Default

Quote:
Originally Posted by tjs44 View Post
Lou,FYI,for guys that build pontiac street motors and need to gurantee their work,some like Dave a SD will hold iron heads to 9.25 and alu heads to 10.25.With the increasing amount of piss gas that is being sold to us now,he feels thats the safe limit.Tom
I'll go 9.5-1 with iron and 10.5 with aluminum.
__________________
## Fastest Hydraulic Roller Pontiac Street Car on the Planet AND Pump gas. 9.30@144 ##

Your Hydraulic Roller Street/Strip Engine Specialist
ATI ProCharger Dealer. PONTIAC blow thru setups for Traditional Pontiac engines.

http://PontiacDude.cc
Feel free to call 352-796-8800 weekdays, PM or e-mail. pdsales@bellsouth.net
I Specialize in ALL American Muscle Iron.
Pontiac Dude is offline   Reply With Quote
Old 09-28-07, 04:46PM   #14
tjs44
Ram Air V Guru
 
Join Date: Jul 2002
Location: long beach,california
Posts: 1,210
Default

Ken,you can get 93 gas?We can only get 91,LOL,Tom
tjs44 is online now   Reply With Quote
Old 09-29-07, 11:56PM   #15
shaker455
Carb Guru
 
shaker455's Avatar
 
Join Date: Aug 2002
Location: NH
Posts: 224
Default

Quote:
Originally Posted by Gach View Post
PS: In one of the pictures you can clearly see he used off set
rockers, he relocated the rocker studs, I assume he used off
set lifter too, but it's hard to tell from the pictures.
Gach,
I machined Lenny's offset rocker arm studs and also made the stud girdle.

Yes he did use offfset lifters and rockers

He first used those heads on his 505 which did not make the deadline for the 2005 competition but made 725 hp


Hectore,
When I first met Lenny he was running an 11.4:1 Iron RAIV head, alum rod on his 458 street/strip engine which is now in his son's Bobby's 66' GTO until they get the well over due Tiger heads on Bobby's 505 that's going to make about 900 HP.

I had looked at the bearings in the 458 during some teardown inspections and there were no signs of detionation..

A few years ago I built a 400 stroker for my friend down the street and we used his #62 heads with flat top Ross which again is 11.4:1

Lenny designed the cam and guided me thru the engine design..

This is a street driven pump gas engine

BDHABT,
We really got some postive results out of your Dominator so it was cool you came up for the day.

Jeff

Last edited by shaker455 : 09-30-07 at 12:09AM.
shaker455 is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Engine Masters EFI Tuning Article 68Formula EFI Tech and Tuning Info 1 10-15-09 10:50PM
Engine Masters cams Gach Engine Tech Discussion - Street or Strip 20 08-11-08 03:33PM
The 409 Engine Masters engine gtofreek Proven Engine Combinations 61 05-30-08 01:42AM
Article in newest Engine Masters Issue Ford Engineer Forced Induction 4 05-23-08 10:50AM
Jon Kaase Pontiac Engine is Runner-up @ Jegs Engine Masters Challenge Johnny406 Engine Tech Discussion - Street or Strip 3 12-21-06 06:41PM


All times are GMT -3. The time now is 08:49PM.

Featured Ads
Ken's Speed & Machine
Mayhem Turbocharging

Carter Cryogenics.  What can we freeze for you?

Pacific Performance Racing

Central Virginia Machine Service.  Home of the Injun Engine!

All Pontiac Engine Kits

Larry's Auto Machine.  Full serivce auto, marine machine shop, domestic and foreign.

Powered by vBulletin® Version 3.6.8
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
2001 - 2007 PontiacZone.com
Page generated in 0.11839 seconds with 10 queries