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Re: Indy 400-I4 t ram mod
[Re: mopar dave]
#3031736
04/08/22 01:28 AM
04/08/22 01:28 AM
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Joined: Aug 2003
Posts: 41,629
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 41,629
Bend,OR USA
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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.  Good work Never ASS U ME anything stock is correct 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Indy 400-I4 t ram mod
[Re: mopar dave]
#3031789
04/08/22 09:12 AM
04/08/22 09:12 AM
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Joined: May 2019
Posts: 619
Lake Villa Il
INTMD8
mopar
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mopar
Joined: May 2019
Posts: 619
Lake Villa Il
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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
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Re: Indy 400-I4 t ram mod
[Re: mopar dave]
#3031799
04/08/22 10:32 AM
04/08/22 10:32 AM
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Joined: May 2019
Posts: 619
Lake Villa Il
INTMD8
mopar
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mopar
Joined: May 2019
Posts: 619
Lake Villa Il
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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
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Re: Indy 400-I4 t ram mod
[Re: Tig]
#3031813
04/08/22 11:42 AM
04/08/22 11:42 AM
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Joined: Jan 2004
Posts: 4,266
Motor City
6PKRTSE
master
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master
Joined: Jan 2004
Posts: 4,266
Motor City
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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. 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]](http://i.imgur.com/5KFh3IA.jpg) ![[Linked Image]](http://i.imgur.com/AEcXtSn.jpg) 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.
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Re: Indy 400-I4 t ram mod
[Re: mopar dave]
#3031818
04/08/22 11:52 AM
04/08/22 11:52 AM
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Joined: Aug 2003
Posts: 41,629
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 41,629
Bend,OR USA
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Longer stroke would push the piston to the top quicker. Not really, RPM is RPM, the longer the stroke the more distance traveled, correct  Stroker motors suck in more air and fuel than short stroke motors do on the same stroke RPM hence the more power they make.  Thye have more ring travel per RPM so maybe they wear out the rings quicker per mile traveled also
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Indy 400-I4 t ram mod
[Re: Cab_Burge]
#3031865
04/08/22 02:07 PM
04/08/22 02:07 PM
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Joined: Jan 2003
Posts: 2,773
A shed in England
Tig
master
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master
Joined: Jan 2003
Posts: 2,773
A shed in England
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Longer stroke would push the piston to the top quicker. Not really, RPM is RPM, the longer the stroke the more distance traveled, correct Stroker motors suck in more air and fuel than short stroke motors do on the same stroke RPM hence the more power they make. Thye have more ring travel per RPM so maybe they wear out the rings quicker per mile traveled also 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 
'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 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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