Rebuilding A Doug Nash 4+1 Street 5 Speed
- Thread starter 2Loose
- Start date
8
87vette81big
Guest
2Loose said:
I think the 2Loose Supercharged Olds 425 is making well over 600 Ft/lbs flywheel Torque now Willy.
Blow that Trans too.
800-1400 Ft/lb capacity Trans needed.
8
87vette81big
Guest
Its the weight of the Gasser 55 too.
Moving a Shoe Box Fast Forward .
Moving a Shoe Box Fast Forward .
2Loose
reliable source of info
OK, I'm refusing to go automatic, what would you guys suggest for a good stick tranny I can slam gears with?
Forget the Lenco, no downshifting capabilities....
As a really good mechanical engineer with good understanding of the processes,
I do not understand why Lenco can not build a planetary system for the street
that would include downshifting parameters....
Emailed them on that question and have yet to hear back from them....
If I were younger, I'd build one that would work that way, but am too
old for that these days....
Willy
Forget the Lenco, no downshifting capabilities....
As a really good mechanical engineer with good understanding of the processes,
I do not understand why Lenco can not build a planetary system for the street
that would include downshifting parameters....
Emailed them on that question and have yet to hear back from them....
If I were younger, I'd build one that would work that way, but am too
old for that these days....
Willy
8
87vette81big
Guest
2Loose said:
LENCO IS FOR FULL BORE DRAG RACE WILLY>>>>WARREN JOHNSON PROSTOCK TYPES>>>>200K Chassis>>>>150 K Engine, Trick titanium Bellhousing scattershield $10k.
Prize $$$$ to win that Race........$200K. On ESPN. On cover of Car Craft & Hotrod & National Dragster Magazine.
Find a 1966- 71 Mopar Dodge Plymouth Hemi 4-speed New Process 883 Trans.
Rebuild it. Or I can do it for you.
$1k or less with searching.
Crash box versions made for over the counter sales in dealerships up to 1977 or so.
5 & 6 speeds sticks overdrives are for want a BEEES.
Real Drag Cars dont use Overdrive , just run slow...............
8
87vette81big
Guest
Hemi 4-speed is identified by a coarse spline 18 count input shaft Willy.
The standard 883 has a 23-spline input shaft.
Hemi 4-speed developed for the FACTORY 1965 426 Race Hemi.
Dominated NASCAR & DRAGRACE.
Only Dyno Don Nicholisn (Chevy) & Arnie Beswick(Pontiac) were Competitive then.
The standard 883 has a 23-spline input shaft.
Hemi 4-speed developed for the FACTORY 1965 426 Race Hemi.
Dominated NASCAR & DRAGRACE.
Only Dyno Don Nicholisn (Chevy) & Arnie Beswick(Pontiac) were Competitive then.
2Loose
reliable source of info
ok, I did it, I just could not stand not having my "gasser" available to me, and I got really tired of busting my "450 hp" Doug Nash 4+1 !
And I did not want to have to change out my clutch, driveshaft, etc....
Of course, when RG (Richmond Gear) notified me that the input shaft I need to rebuild my box, will not be available to ship until AUGUST !!!, I sorta had a 'hissy-fit', as my daughter would put it !
So I checked everywhere I had a few pennies hidden away, found a few that needed to be put to "good use", and went and ordered a 600 hp rated Richmond Gear "Super Street" 5 speed. I'm not real pleased that the 5th gear is an overdrive, and the first four are still pretty close ratio, except I went and ordered with the 3.08 (some sources say 3.01) ratio first gear, which will still work pretty well with my 3.50 rear gear. 5th is .7 or something like that, which I probably will seldom use except a very few areas on the island signed at "55", but everybody goes 65-70 and the cops seem to look the other way, unless the County is running short on funds........
But it will bolt up where the Doug Nash is now, I can use the same driveshaft, it should be an easy switch to do....
LINK to the Richmond Gear "Super Street" 5 speed
If this tranny actually comes with any sort of guarantee, let's see if they live up to it.
I remain....
"2Loose" Willy
And I did not want to have to change out my clutch, driveshaft, etc....
Of course, when RG (Richmond Gear) notified me that the input shaft I need to rebuild my box, will not be available to ship until AUGUST !!!, I sorta had a 'hissy-fit', as my daughter would put it !
So I checked everywhere I had a few pennies hidden away, found a few that needed to be put to "good use", and went and ordered a 600 hp rated Richmond Gear "Super Street" 5 speed. I'm not real pleased that the 5th gear is an overdrive, and the first four are still pretty close ratio, except I went and ordered with the 3.08 (some sources say 3.01) ratio first gear, which will still work pretty well with my 3.50 rear gear. 5th is .7 or something like that, which I probably will seldom use except a very few areas on the island signed at "55", but everybody goes 65-70 and the cops seem to look the other way, unless the County is running short on funds........
But it will bolt up where the Doug Nash is now, I can use the same driveshaft, it should be an easy switch to do....
LINK to the Richmond Gear "Super Street" 5 speed
If this tranny actually comes with any sort of guarantee, let's see if they live up to it.
I remain....
"2Loose" Willy
2Loose
reliable source of info
Playin' around checkin' the percent of gear change with the two Richmond Gear 5 speeds:
Kinda interesting to look at these numbers....
Well now, Richmond Gear has told both Summit and Jegs that the "super street" 5 speed
will not be available until August! Looking at options.
Willy
Kinda interesting to look at these numbers....
Well now, Richmond Gear has told both Summit and Jegs that the "super street" 5 speed
will not be available until August! Looking at options.
Willy
Willy, you might find this Excel spreadsheet interesting. It will plot curves
depicting the gear changes. No reason it wouldn't work with an manual trans,
you will need to edit the ratios on the first page.
viewtopic.php?f=99&t=5665
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8
87vette81big
Guest
Going way back to 1988 a Super Stock Pontiac Formula Firebird was built. High Performance Pontiac magazine.
Richmond 5-speed used.
400 ci Pontiac Power.
6X cast iron smog era heads unported. No gasket matching allowed .
Stock lift cam. Long duration & tight lobe centerline of 105.
Flywheel Dyno power of 435HP.
Long tube headers.
5.13 rear gears in a 12 bolt Chevy.
1st gear never used. 2nd gear starts.
5,000 Rpm launches.
Clicked off Low 11-second 1/4 mile times.
Bird wieghed 3800 lbs with driver & gas.
Richmond 5-speed used.
400 ci Pontiac Power.
6X cast iron smog era heads unported. No gasket matching allowed .
Stock lift cam. Long duration & tight lobe centerline of 105.
Flywheel Dyno power of 435HP.
Long tube headers.
5.13 rear gears in a 12 bolt Chevy.
1st gear never used. 2nd gear starts.
5,000 Rpm launches.
Clicked off Low 11-second 1/4 mile times.
Bird wieghed 3800 lbs with driver & gas.
8
87vette81big
Guest
Factory Q-jet iron intake mainfold & Q-jet carb.
Carb was home blueprinted.
Carb was home blueprinted.
8
87vette81big
Guest
All the old Pontiac Super Stock & Chevie guys seldom used 1st gear.
2nd gear starts.
4.88-6.14 gears.
Forgotten knowledge.
I was told many years ago. Beswick.
2nd gear starts.
4.88-6.14 gears.
Forgotten knowledge.
I was told many years ago. Beswick.
2Loose
reliable source of info
Cool info, will check it out....
Since it looks like the RG "super street" 5 speed is just not available, looking around, I'm considering the Tremec TKO600 road race 5 sp, rated at 600 ft lbs. The gears are very similiar to the RG "super street":
2.87
1.89
1.28
1.00
0.82
Part #TCET4618
Anybody know anything about these boxes?
I was trying to stay with RG because their new 600 ft lb rated box would fit in my car with essentially no changes, not so sure about the Tremec, but it seems to be available now.
Willy
Since it looks like the RG "super street" 5 speed is just not available, looking around, I'm considering the Tremec TKO600 road race 5 sp, rated at 600 ft lbs. The gears are very similiar to the RG "super street":
2.87
1.89
1.28
1.00
0.82
Part #TCET4618
Anybody know anything about these boxes?
I was trying to stay with RG because their new 600 ft lb rated box would fit in my car with essentially no changes, not so sure about the Tremec, but it seems to be available now.
Willy
8
87vette81big
Guest
See any with a 2.20 1st gear Willy ?
Just like the old M21 & M22 clode ratio Rock Crusher ?
When the 1st gear gets taller, lower numerically, Torque capacity peak is increased dramatic.
Its a Linear Curve.
Just like the old M21 & M22 clode ratio Rock Crusher ?
When the 1st gear gets taller, lower numerically, Torque capacity peak is increased dramatic.
Its a Linear Curve.
8
87vette81big
Guest
The Powerglide GM 2-SPEED AUTO is A Prime Example of why Tall 1st gear gives it very high Peak Input & Torue & HP Capacity.
2,000 HP is no sweat for a properly built Glide.
Only other up to task is Lenco at extreme HP.
2,000 HP is no sweat for a properly built Glide.
Only other up to task is Lenco at extreme HP.
8
87vette81big
Guest
When Transmissions keep grenading, choose a Trans with a tall starting gear.
Close ratio spread of 17-28% RPM DROP.
Go back to the Rear Diff. Change Gears.
Want ET, 4.56-6.14 REQUIRED.
Unless you have 1,400-2,000 HP.
THEN TALL REAR DIFF GEARS WILL WORK.
Close ratio spread of 17-28% RPM DROP.
Go back to the Rear Diff. Change Gears.
Want ET, 4.56-6.14 REQUIRED.
Unless you have 1,400-2,000 HP.
THEN TALL REAR DIFF GEARS WILL WORK.
2Loose
reliable source of info
I do have a M21 stashed away. Pulled it out of my 67-442 after totaling it in the 70's. Kept the 400 motor also, same forged crank as the 425 Olds in my car.
M -21:
Ratio: 2.20 / 1.64 / 1.28 / 1.00
I did get tired of feeling I was always overrevving that motor on the street though, with 4.56 rear gears.
M -21:
Ratio: 2.20 / 1.64 / 1.28 / 1.00
I did get tired of feeling I was always overrevving that motor on the street though, with 4.56 rear gears.
8
87vette81big
Guest
I don't think the Muncie will Fail Willy.
Only weakness is my experience is they don't like extreme RPMS over 8k RPM's too long.
The Front clutch gear bearing sometimes fail then.
Makes it hard to poweshift into 4th.
Build another 9 inch 3rd Member.
1 street gear.
1 Drag Race.
Just need an old Hurst Inline Shifter.
Or a Hurst Competition Plus Shifter with Reverse Lockout.
Only weakness is my experience is they don't like extreme RPMS over 8k RPM's too long.
The Front clutch gear bearing sometimes fail then.
Makes it hard to poweshift into 4th.
Build another 9 inch 3rd Member.
1 street gear.
1 Drag Race.
Just need an old Hurst Inline Shifter.
Or a Hurst Competition Plus Shifter with Reverse Lockout.