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  1. PGCobra

    Propshaft strength ?

    GMIracing, thanks for your input. Now I am confused. I recently talked to my Torque Convertor manufacturer who never mentioned anything about a Stall Ratio and not one to the factor of x2 ! This makes a hell of a difference to my final anticipated torque output to relate to my propshaft...
  2. PGCobra

    Propshaft strength ?

    Hi Guys, thanks for all your info. I have just been guided to the figures/fomulation I need :- Roarks formulae for Stress and Strain, which quotes as 2 x Torque x outer radius / 3.142 ( outer rad to the fourth power - inner rad to the forth power ). Done the calcs and I'm just inside the...
  3. PGCobra

    Propshaft strength ?

    tbueina, thanks for your reply. Yes the 600lbsft torque is at the flywheel and will be applicable when setting off in 1st gear which has a 2.48:1 gear ratio. Final drive ratio is 3.25:1. Yes the "steel tube" is no ordinary steel and is highly resistant to twisting forces. The exact given...
  4. PGCobra

    Propshaft strength ?

    Hi, I have a car I use for Drag Racing. Can someone tell me if the material I have used on previous occassions is suitable for this new application. The material is T45 steel tubing. 50.8mm od x 2.9mm wall thickness. The propshaft length is approx 30". The drive train on start is subject to...
  5. PGCobra

    Exhaust Gas Temps.

    Hi Pat, yes I've heard of that ( was from Holley?), but when you get to the level of tune I'm into you have to do modifications not only as decribed before but :- Vacuum Balance between the Secondary diaphragm housings. Discard the 3/16" check in each diaphragm housing. Pump Nozzles changed,as...
  6. PGCobra

    Exhaust Gas Temps.

    Hi Mike,ISZ and Pat. Just not possible to swap the Carbs side by side, or inline. I did look into this but it's just not on - I'd get in all sorts of linkage/fuel line problems. BUT please read on as The End is Nigh. I agree that I have a problem on the Primary circuit and I have given it...
  7. PGCobra

    Exhaust Gas Temps.

    I agree Patprimmer, all helical rotor Blowers push the charge to one end - usually to the front casing ( gear ) end. All Roots type Blowers such as these only have efficiencies of 35 to 60%. Later Superchargers such as made by Eaton and used by Jaguar, Aston Martin for example, use 3 lobe high...
  8. PGCobra

    Exhaust Gas Temps.

    Thanks guys for the replies & questions. Firstly let me rectify my typing error re the exhaust gas temps. I should have entered " the exhaust temp range between the 2 banks of cylinders are between 50 ( lower rpm ) to 250 ( higher rpm ) deg F ". ie the LH side ran cooler by this temp range...
  9. PGCobra

    Exhaust Gas Temps.

    to answer your question re trying various jetting - yes of course we did, but please read on re this particular subject. Should have given more tech info initially. As a 'newby' to this site I was not sure how much info to burden you with. The engine is a small block chevy with an 8v-92 Blower...
  10. PGCobra

    Exhaust Gas Temps.

    Hello, my supercharged 383 cuins SBC has come off a Dyno and left me with a number of questions, one of which is why do the RH bank of cylinders ( #'s 1,3,5 & 7 ) run hotter than the LH bank ( #'s 2,4,6 & 8 ). The temp range is between 50 to 250 degF on average. Thanks.
  11. PGCobra

    Diesel generator troubleshooting again

    Hello, I have a Supercharged ( 9V-92 ) SBC which has just come off the Dyno. I had a problem getting my head around a number of the readings obtained. Firstly, why does my LH bank exhaust gas temps ( #2, 4, 6 & 8 )run colder than the RH ( # 1, 3, 5 & 7 ). The temp differences varied from 80...

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