Previous Thread
Next Thread
Print Thread
Page 2 of 2 1 2
Re: Indy 400-I4 t ram mod [Re: Cab_Burge] #3031724
04/07/22 11:46 PM
04/07/22 11:46 PM
Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
mopar dave Offline OP
master
mopar dave  Offline OP
master

Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
I use a 71 400 cover and with my ATI damper it is dead on 0 at TDC. Just checked it and more accurate than i thought it would be.

Re: Indy 400-I4 t ram mod [Re: mopar dave] #3031736
04/08/22 01:28 AM
04/08/22 01:28 AM
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 43,007
Bend,OR USA
Originally Posted by mopar dave
I use a 71 400 cover and with my ATI damper it is dead on 0 at TDC. Just checked it and more accurate than i thought it would be.
up Good work up
Never ASS U ME anything stock is correct scope


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Indy 400-I4 t ram mod [Re: Cab_Burge] #3031786
04/08/22 09:01 AM
04/08/22 09:01 AM
Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
mopar dave Offline OP
master
mopar dave  Offline OP
master

Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
Being that the 400 is a different stroke than the 511, you would think it would be off. Maybe just got lucky there?

Re: Indy 400-I4 t ram mod [Re: mopar dave] #3031789
04/08/22 09:12 AM
04/08/22 09:12 AM
Joined: May 2019
Posts: 701
Lake Villa Il
INTMD8 Offline
super stock
INTMD8  Offline
super stock

Joined: May 2019
Posts: 701
Lake Villa Il
Originally Posted by mopar dave
Being that the 400 is a different stroke than the 511, you would think it would be off.


Why is that?


69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700
Re: Indy 400-I4 t ram mod [Re: INTMD8] #3031797
04/08/22 10:01 AM
04/08/22 10:01 AM
Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
mopar dave Offline OP
master
mopar dave  Offline OP
master

Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
Longer stroke would push the piston to the top quicker.

Re: Indy 400-I4 t ram mod [Re: mopar dave] #3031799
04/08/22 10:32 AM
04/08/22 10:32 AM
Joined: May 2019
Posts: 701
Lake Villa Il
INTMD8 Offline
super stock
INTMD8  Offline
super stock

Joined: May 2019
Posts: 701
Lake Villa Il
Crankpin to keyway location remains the same no matter what the stroke is.


69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700
Re: Indy 400-I4 t ram mod [Re: INTMD8] #3031801
04/08/22 10:37 AM
04/08/22 10:37 AM
Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
mopar dave Offline OP
master
mopar dave  Offline OP
master

Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
Ok, maybe im thinking it wrong. Just thought with longer stroker top dead center would be different. Always learning.

Re: Indy 400-I4 t ram mod [Re: Tig] #3031813
04/08/22 11:42 AM
04/08/22 11:42 AM
Joined: Jan 2004
Posts: 4,539
Motor City
6
6PKRTSE Offline
master
6PKRTSE  Offline
master
6

Joined: Jan 2004
Posts: 4,539
Motor City
Originally Posted by Tig
It seems Indy re-designed them. Not exactly sure which way round chronologically, I think maybe the later T/R's have less bolts for the top ?.
It seems my memory is incorrect, mine DOES have a divider. Date on the photo's are from roughly when it was purchased and kindly sent by Todd Marsh (Sasquatch) many moons ago.

Originally Posted by 6PKRTSE
Originally Posted by Tig
Going to try this, having a 9/16 phenolic spacer machined up very soon.

I fabbed up some 1/2" thick anti-reverson plates for under my carbs and also 1/2" thick delrin/nylon insulator/spacer for my tunnel ram. If you look closely it is the white portion between the intake and top plate. I made several and tried none and up to 4 spacers on dyno with no significant power or torque improvements over not having any. Choose to just use the one to help keep the top plate and carbs cooler.


Hmmm....useful to know. Probably won't make any difference then, my carbs are hanging in the breeze anyway.

[Linked Image]
[Linked Image]


My tunnel ram looks just like that inside but I and blended it all over.


1963 Belvedere 440 Max Wedge Tribute
1970 Charger R/T S.E. 440 Six Pack
1970 Challenger R/T, 528 Hemi
1970 Charger 500 S.E. 440 4 BBL
1970 Plymouth Road Runner 383
1974 Chrysler New Yorker 440
1996 2500 RAM 488 V-10 4X4
2004 3500 Dually Cummins 4x4
2012 Challenger R/T Classic.
Re: Indy 400-I4 t ram mod [Re: mopar dave] #3031818
04/08/22 11:52 AM
04/08/22 11:52 AM
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 43,007
Bend,OR USA
Originally Posted by mopar dave
Longer stroke would push the piston to the top quicker.

Not really, RPM is RPM, the longer the stroke the more distance traveled, correct work
Stroker motors suck in more air and fuel than short stroke motors do on the same stroke RPM hence the more power they make. shruggy Thye have more ring travel per RPM so maybe they wear out the rings quicker per mile traveled also work shruggy


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Indy 400-I4 t ram mod [Re: Cab_Burge] #3031865
04/08/22 02:07 PM
04/08/22 02:07 PM
Joined: Jan 2003
Posts: 2,902
A shed in England
Tig Offline
master
Tig  Offline
master

Joined: Jan 2003
Posts: 2,902
A shed in England
Originally Posted by Cab_Burge
Originally Posted by mopar dave
Longer stroke would push the piston to the top quicker.

Not really, RPM is RPM, the longer the stroke the more distance traveled, correct work
Stroker motors suck in more air and fuel than short stroke motors do on the same stroke RPM hence the more power they make. shruggy Thye have more ring travel per RPM so maybe they wear out the rings quicker per mile traveled also work shruggy

As I understand it, piston speed is increased and thus piston acceleration. On a theoretical 3.50 stroke and a 5.00 stroke motor, the piston will arrive at TDC at the same time if they were at the exact same RPM. (And that they started in the same place etc etc)
The piston will accelerate quicker away from TDC on the 5.0 stroke motor, it also decelerates quicker to arrive at BDC.
You need good pistons for a big stroke crank grin


'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
Page 2 of 2 1 2






Powered by UBB.threads™ PHP Forum Software 7.7.1