Hi Folks,
Just thought I would let ya'll know what I am running way over here in Oz ! The car has been around with this setup for a couple of years but am happy with results considering this was a "very" budget minded buildup.
I am about to pull this motor in the next couple of months as I am in the process of building a new long-rod turbo Slant..... I can't wait to let that 225 rev a little more freely. Those of you have done the long-rod thing.... is it worth the wait ?
Anyway, the bottom end of my old girl is fairly standard, only major mod was a set of low compression dished "cast" truck pistons in a 40' oversize. The head is ported and runs oversized valves..... while on this topic, what is the largest valve sizes fitted in a Slant 6 and availability of such valves if required ? .... A modified standard exhaust manifold send the spent exhaust gases to the puffer. I am using a T04 hybrid using an RX7S5 exhaust housing adn V trim wheel. The injection setup is a triple SU intake using 3 x RB25 throttle bodies, hi-flow late bodies injectors and Microtech computer. I retain the electronic Mopar distributor which is locked-out with no mech or vac advance at all, but I have an ignition exciter that enables the computer to control ignition timing.
I also use a custom water-air intercooler that is absolutely awesome...best money I ever spent. My last chassis dyno run gave me 272rwhp @ 22lbs boost. I run this setup on the street now. I find it a littel docile off-boost but am putting it down to the lack of air velocity at low rpm due to the triple throttle body setup as they are 55mm each and in hindesight just too much cfm for this engine at lower rpm. With the new motor I will be removing this intake setup and building a plenum with one single 70mm throttle body. I am looking at much better off-boost driving results.
I used to run this setup with a manual transmission but have now got a tricked up 904 behind it...I have had all sorts of troubles with convertors....tearing one quality stator in two !! This thing makes more torque than I know what to do with...although i do not know the actaul torque rating but I do know that we recently had a club dyno day with over 30 cars attending. The chassis dynno reads "tractive effort" which although cannot be an exact determiation of torque can provide a clear idea of differnces in torque compared to other cars. My highest reading of tractive effort was 2650 my lowest was @ peak power was 1650, the closest car on the day made a highest tractive effort reading of 1100 .... my lowest point of TE was well over all the others highest..... obviously that is why the old 225 turns the wheels so easy for one of my favourite pastimes...BURNOUTS. The pics show a couple of my recent competition attempts, making the Mopar fans proud !
On the track, my best run is a 13.567 @ 105mph although my 60foot is 2.565 .... I just cannot get out of the hole. The convertor is working better for me but it is now coming down to a fine line between spinning the wheels while staging or not leaving with enough boost up. Again, needs a little refinement but i am getting there.
Anyway, i hope you like my ride and would be keen for your feedback.
Ray.
www.moparmarket.com
