PONTIAC ZONE TECH FORUMS
 

Go Back   PONTIAC ZONE TECH FORUMS >
Engine Tech
> Low Compression Street Engine's & Tuning Techniques
User Name
Password

Low Compression Street Engine's & Tuning Techniques Idea's...How Too's on low compression Engines.

sponser links

Reply
 
Thread Tools
Old 01-29-12, 08:27PM   #1
1967 Tempest
Hit IT!!!!!
 
1967 Tempest's Avatar
 
Join Date: Aug 2009
Location: Durham
Posts: 218
Default Follow the cam swap!!! IN the 67 Tempest!

I am going to post the cam swap on this board.

I am just swapping the cam and intake.

Current Set-up:

77 Pontiac 400 Bored to 406
6X-4 heads with my own cleaning of the bowls and removal of runner flash 94CC's
Felpro 8518 head gasket
Crower 68404 Springs and retainers
Stock Valves with 3 angle valve job
8.3 SCR

Edelbrock Performer out of the box
Holley Street Avenger 670 out of the box (Black cam on #2)
Iskenderian Cams 901252/256 Installed straight up
OEM timing set
H.E.I with Crane vacuum advance
24* initial with 12* mechanical with 14* Vacuum = 50* total
RSX45T plugs
8 mm Taylor wires

Pontiac Cast iron Exhaust manifolds (Don't talk headers. I will never install another set as long as I breathe in air.)
Pypes 2.5" Downpipes
Pypes 2.5" Intermediate pipes
Thrush Turbo mufflers 2.5" offset/offset
Flowmaster 1 piece mandrel bent 2.5" tailpipes

Saginaw 4 speed with 3.11 first gear
1970 GTO rear one legger with 3.23 gears

I am swapping the cam to an Ultra Dyne 220/226 cam
Edelbrock TII intake.

I don't have access to a track and finding a stretch of road to test is some what difficult. I do plan on posting a video with some pulls of current set up to get an idea of performance before and after swap whether it be good or bad.

Here are the two cams....

Current
http://iskycams.com/timingchart.php?...=CL-901256/262

New
http://i689.photobucket.com/albums/v...Cardfor406.jpg


Keep in mind that I am swapping to see what will happen. This is a learning thread. So I am anticipating that the HP will go up and TQ will go down to even the engine out.

More to come...

P.S. Here is a quick video....
http://youtu.be/Db6IzNAlNuY?hd=1
__________________
1967 Pontiac Tempest 2dr HRDTP Coupe 5 speed
1986 F-150 2WD 4 speed w/Granny
1967 Tempest is offline   Reply With Quote
Old 02-02-12, 11:21PM   #2
1967 Tempest
Hit IT!!!!!
 
1967 Tempest's Avatar
 
Join Date: Aug 2009
Location: Durham
Posts: 218
Default

http://youtu.be/GlAGfUNlFQ0?hd=1
__________________
1967 Pontiac Tempest 2dr HRDTP Coupe 5 speed
1986 F-150 2WD 4 speed w/Granny
1967 Tempest is offline   Reply With Quote
Old 02-02-12, 11:22PM   #3
1967 Tempest
Hit IT!!!!!
 
1967 Tempest's Avatar
 
Join Date: Aug 2009
Location: Durham
Posts: 218
Default

http://youtu.be/xgjzmdNMaRM?hd=1
__________________
1967 Pontiac Tempest 2dr HRDTP Coupe 5 speed
1986 F-150 2WD 4 speed w/Granny
1967 Tempest is offline   Reply With Quote
Old 03-05-12, 02:29PM   #4
1967 Tempest
Hit IT!!!!!
 
1967 Tempest's Avatar
 
Join Date: Aug 2009
Location: Durham
Posts: 218
Default new video

new video!!

http://youtu.be/U7cmyzWJ9Gw?hd=1
__________________
1967 Pontiac Tempest 2dr HRDTP Coupe 5 speed
1986 F-150 2WD 4 speed w/Granny
1967 Tempest is offline   Reply With Quote
Old 03-05-12, 11:07PM   #5
boomers T/A
Registered User
 
Join Date: Nov 2010
Location: farmington ar 72730
Posts: 70
Default

I like James Brown, but more Pontiac sound please! I really didn't think that cam would be that "raspy" in a 400........did you install it "straight up" ? or did I miss the "tight" lobe seperation in your post? anyway sounds good just depends how much you're gonna drive it IMHO. Of course the 4 speed helps! It's all good! have fun!
boomers T/A is offline   Reply With Quote
Old 03-06-12, 12:08AM   #6
1967 Tempest
Hit IT!!!!!
 
1967 Tempest's Avatar
 
Join Date: Aug 2009
Location: Durham
Posts: 218
Default

LOL!!!!!

I am going to make a new, in car video.

Yup 11.5 Lobe sep with zero overlap!!

More to come..

Without James Brown!!!
__________________
1967 Pontiac Tempest 2dr HRDTP Coupe 5 speed
1986 F-150 2WD 4 speed w/Granny
1967 Tempest is offline   Reply With Quote
Old 03-07-12, 12:20PM   #7
1967 Tempest
Hit IT!!!!!
 
1967 Tempest's Avatar
 
Join Date: Aug 2009
Location: Durham
Posts: 218
Default

Upped the timing to 21* initial. I found that I had to back out of the idle screws a lot more on the single plane intake than a dual plane. It idles much more stable. Much less raspy. more smooth. more to come..

Dave
__________________
1967 Pontiac Tempest 2dr HRDTP Coupe 5 speed
1986 F-150 2WD 4 speed w/Granny
1967 Tempest is offline   Reply With Quote
Old 03-10-12, 11:19AM   #8
boomers T/A
Registered User
 
Join Date: Nov 2010
Location: farmington ar 72730
Posts: 70
Default

In your honest opinion.........is it alot faster? and is it still as user friendly?
boomers T/A is offline   Reply With Quote
Old 03-10-12, 11:31AM   #9
1967 Tempest
Hit IT!!!!!
 
1967 Tempest's Avatar
 
Join Date: Aug 2009
Location: Durham
Posts: 218
Default

Quote:
Originally Posted by boomers T/A View Post
In your honest opinion.........is it alot faster? and is it still as user friendly?
After putting a few more miles on it, the LOW end torque is a little less than previous cam.

That being said, it is MUCH faster than before. It now blazes to 5500. Revs much faster and has a better throttle response over 2500.

As I have never legally drag raced, forgive me if I get the terms wrong, but I would say my 60 foot times might be a hair slower, but the whole 1/4 is probably 2 seconds faster.

I could get the car sideways in 3rd gear now!!

More to come..
__________________
1967 Pontiac Tempest 2dr HRDTP Coupe 5 speed
1986 F-150 2WD 4 speed w/Granny
1967 Tempest is offline   Reply With Quote
Old 03-12-12, 12:18AM   #10
1967 Tempest
Hit IT!!!!!
 
1967 Tempest's Avatar
 
Join Date: Aug 2009
Location: Durham
Posts: 218
Default

New in car video. I need to find a spot where I can do some more full throttle pulls. I have a knack for attracting the local P.D.

Put 50 miles on it the other day. Runs at T-Stat on 87 octane. I filled it with 89 just cause it was sitting forever!!!


Dave

http://youtu.be/iJnjvUXMScA?hd=1
__________________
1967 Pontiac Tempest 2dr HRDTP Coupe 5 speed
1986 F-150 2WD 4 speed w/Granny
1967 Tempest is offline   Reply With Quote
Old 03-26-12, 10:53PM   #11
goatwgn
Registered User
 
Join Date: Feb 2011
Location: Chesapeake Virginia
Posts: 17
Thumbs up

Nice video. Sounds good.
goatwgn is offline   Reply With Quote
Old 03-27-12, 09:43AM   #12
1967 Tempest
Hit IT!!!!!
 
1967 Tempest's Avatar
 
Join Date: Aug 2009
Location: Durham
Posts: 218
Default

Thanks! What I learned is that if you have a small exhaust leak with a small camshaft, will turn into a big leak with a big camshaft. Maybe not bigger, but louder!!! I have been chasing that down for awhile. I will have to fix it this summer..

More to come. Better camera angles etc..

Dave


I have to get a few dyno pulls
__________________
1967 Pontiac Tempest 2dr HRDTP Coupe 5 speed
1986 F-150 2WD 4 speed w/Granny
1967 Tempest is offline   Reply With Quote
Old 06-12-12, 08:52AM   #13
1967 Tempest
Hit IT!!!!!
 
1967 Tempest's Avatar
 
Join Date: Aug 2009
Location: Durham
Posts: 218
Wink

The exhaust leaking is really starting to tick me off, yet I love driving it. And now I am too close to the PY show to rip it apart.

I had a slight stumble on WOT full pulls in 1st. I added a 1" phenolic spacer. Problem solved!!! It Runs great!!! I think that it might be alittle lean.

Primary jets out of the box are 65's. I might go up to 67/68 to see how she likes it...

More to come
__________________
1967 Pontiac Tempest 2dr HRDTP Coupe 5 speed
1986 F-150 2WD 4 speed w/Granny
1967 Tempest is offline   Reply With Quote
Old 06-24-12, 03:25PM   #14
sprint250
Moteesuh
 
sprint250's Avatar
 
Join Date: Jul 2002
Location: La Jolla , California
Posts: 3,530
Default Testing

Thanks for all the progress reports . Looks and sounds like a fun car to drive and the best part is you did it.

"As I have never legally drag raced, forgive me if I get the terms wrong, but I would say my 60 foot times might be a hair slower, but the whole 1/4 is probably 2 seconds faster."

A guesstimated 2 second 1/4 mile ET inprovement at the track with anticipated worse 60' times is wishful thinking.

Why?
"1970 GTO rear one legger "
The low 3.11 first in the saginaw will compensate the 3.23 gears" at launch ( almost like a granny low).

Depending on: The weight of the car with driver & fuel, how the car is staged, the dead start launch rpms,the clutch,how you slip it ( to keep from blowing the 1 biting tire off in a complete smoke show),the tires ( stock street tread, drag radial or actual slicks) and other suspension & engine tuning you will never know for sure unless the new setup goes to an actual track or street races the same guys you did in the past.
At the least if at all possible the car could be put on a roller dyno to see where the tune up is at.

If you eventually can take to a track 1/8 or 1/4 just be advised with a posi & good hooking tires , depending on driving style, the Saginaw box will eventually give up if pressed on continously.

Other than that.

Have fun with it.
__________________
Step Away From The KOOL AID !
sprint250 is offline   Reply With Quote
Old 06-24-12, 07:18PM   #15
1967 Tempest
Hit IT!!!!!
 
1967 Tempest's Avatar
 
Join Date: Aug 2009
Location: Durham
Posts: 218
Default

Quote:
Originally Posted by sprint250 View Post
The low 3.11 first in the saginaw will compensate the 3.23 gears" at launch ( almost like a granny low).

If you eventually can take to a track 1/8 or 1/4 just be advised with a posi & good hooking tires , depending on driving style, the Saginaw box will eventually give up if pressed on continously.

Other than that.

Have fun with it.
Man!!! Do you live near me??? My 80$ Craigslist Saginaw is starting to see the end.... I RARELY (I have done 2) do burnouts, but I do launch hard after the clutch is fully released. 1st will pop out of gear but the stick will not move. 3rd will pop out of gear, stick move, during hard accel and down shifts.

I am going to be using Hurst Driveline Conversions for their 5 speed TKO500. Here in late July Early August.


I see what you mean about weight. I have a lot of stuff in the car and I know it is very heavy!! Once I get the new trans I will go to the track for street night. I just want to be sure that the car makes it there and back!!!!
__________________
1967 Pontiac Tempest 2dr HRDTP Coupe 5 speed
1986 F-150 2WD 4 speed w/Granny
1967 Tempest 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
Columbus, OH, Feb. 7, Indoor Pontiac Swap Meet rcozzo Races - Shows - Swaps - Events 0 12-30-09 08:46AM
62 tempest tansaxle swap gr85z Transmission TECH 3 08-04-08 03:53PM
66 Tempest Engine Swap 66tempest 1958 - 1981 Pontiac Tech & Restoration 0 07-12-07 07:48AM
1962 Tempest Engine swap JCoons 1958 - 1981 Pontiac Tech & Restoration 1 08-19-06 07:51PM
1968 Pontiac Tempest kharmon 1958 - 1981 Pontiac Tech & Restoration 14 08-22-05 03:18AM


All times are GMT -3. The time now is 07:42PM.

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 - 2018, Jelsoft Enterprises Ltd.
2001 - 2007 PontiacZone.com
Page generated in 0.12174 seconds with 44 queries