Engine and Transmission Tech

Pistons arrived. Appear to be good value. Time will tell if a 4L can live with a 3.736 bore=4L rover for learning curves. Sbc 305" std. stroke pistons,(IC830), =+.005" above deck, theoreticall with 6" rod. What happened to Cometic gaskets for RV8 ? Taking rod journals down to 2.1" vs 2.00, for better strengh. Merlin heads, Huffaker built headers and 600 cfm holley. These 2 items will limit output. Approx 300 hp., enough for driver schools, slaloms/etc.. Cheers, roverman.



Edited 1 time(s). Last edit at 05/16/2012 06:02PM by roverman.

Polish mains and grind rod journals to 2.100",standard stroke-$150. If it all holds together-priceless.roverman.

Hi Art,

That combo is serving us very well at the moment, Keith Black Icon forged pistons and 6" Scat rods, we run the small journal anyway. Compared to the 3.6 combo we ran before, leaving the blower the same the car ran the same ET with lots of wheelspin and 3 mph faster even though boos was well down. Stepping it up a little, although still less boost than before we picked up nearly a quarter of a second, 9.208 ay 142 mph, Speed still down a little as tune up is fat.

Pistons ended up 0.003 proud on an undecked block, we run a 0.04 copper gasket, Real Steel blower cam and have no valve to piston issues even seeing 7000 rpm plus. As long as the fuel grade is good for the eventual compression I think you will be very happy with the combo. I will be interested to see how the Merlin heads perform on this build as considering getting a pair. Did you get any news on the forged crank issue?

Alan

Alan and clan, I spoke with owner of Scat last week, "Tom" is now sizing-up the crank. What blower are you using ? How many studs around the bores ? TA heads will be here soon and a forged crank, will likely be required. I built a GMC 6V-71 blower for Rover V8. Haven't run it yet. I'm deep into restoring my Huffaker TR 8/ GT-1 car now. Much to learn, never enough time. Onward, roverman.

Art - I'm pleased to hear you managed to go up the food chain at Scat. I'm sure you will now get the result you are looking for. I never heard back re my billet enquiry.

Are you waiting for porting or configuring the heads with TA?

All the best,

Julian

Receiving bare heads without guides or porting.I will port and flow- in house. May go with Nascar Ti valves. Possibly use 6 studs around bores. I would like to make a 3.9" bore live,(tractor flanged liners). Cheers, roverman.

Art - That is ambitious, I really hope you can make the 3.9", that would be seriously impressive.

Hamlin engineering in Bridgewater are removing the 94mm liners from my new 4.6 Coscast block to see how far we can go with Darton thin walled ductile iron liners. Otherwise, things are proceeding slowly, I'm on top of the chassis restoration and rebuild and the body strip flatting and primer are in hand but my request for a crank from Allen Cranks via my engine designer seems to have gone astray (very mysterious), so I've reminded Scat of my existence and my request for a quote over 10 weeks ago. I do need two cranks so I can rebuild my old engine, I guess whoever comes up with one first gets the TA heads.

I'm despondent enough to re-commission the red car in the Air Flow tent, but I seem to be hemorrhaging money. It's the English summer this week and there are not many kicks to be had from a '94 Subaru Legacy.

Cheerio,

Julian

Alan, What car is this, that runs 9.2 sec. in the quarter ? Got spray ? Got pic's ? Cheers, roverman.

Got a call from my engine machine shop, seems my 4.0L crank, after grinding, is "lighter" than I asked for. This being 2.0" rod journals vs. 2.10" requested. Bearing spacers, not an option. Looks like I get to run what Huffaker used in late 80's. Anyone try to buy 3.720" racing rings lately ? "Slightly" less than custom pistons. Murphy's Law needs to be repealed ! Onward, roverman.