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#1
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High boost /6??
ive heard that225 /6's have VERY strong heads. Does anyone know how much boost these engines could take from a turbo? Does anyone know persons running high boost /6's.
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#2
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Did you look into Clifford?
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#3
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i did but i couldnt seem to findanything on the internet. I'll look at the sight again. Do they have info on turbo /6's?
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#4
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i looked at clifford but they didnt have any turbo setups or information. I dont know if you meant ditch the turbo and try the other options, but i want to try a turbo since it is somthing i dont know how to do and it interests me. Ive looked at some peoples sights on the internet but they have VERY little information.
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#5
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Go to www.slantsix.org or www.slantsix.com and look for posts by Andrew Wagner. He is about the most succesful at a street turbo Slant. (Except for Cameron Tilley down in Oz) The trick is not how much boost, but boost without detonation.
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#6
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I think the fella down here in Australia uses a Mazda RX7 turbo setup with a modified carby. It's not a big turbo but it is better than many other factory turbos, are cheap second hand and spool up quickly with a fat torque curve. I now somebody who is considering this for a 265 Hemi six.
I reckon looking at EFI would be the most reliable option. |
#7
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efi isnt cheap, though it is probly the best choice for a turbo engine. rx7 turbos make about 15psi boost which is about the same as any mitsubisi t2 which is a verry plentifull turbo at any junkyard and can and will make right around 20psi in a 4cyl, although im not sure how much it would reduce when you add two more cyl.
Ive been doing reasearch and it looks like the only way to do a turbo setup is trial by error. It will be interesting...... |
#8
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Turbo Slant Info.
We see more and more Turbo Slants popping up.
Many are done with junk yard parts and work pretty good. Here is an example: http://www.slantsix.org/articles/tur...bo-article.htm Once you see how a Slant "comes alive" with a little boost, you will want more, Andrew Wagner can speak to that: http://www.wagnermotorsports.net As you said, EFI is the way to go once you start doing major boost. 10-12 lbs can be done without anything special, more if you use special head studs (ARP) and head gasket. Where does it end???.... http://www.slantsix.org/galleries/cl...ake-engine.jpg DD |
#9
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I read somewhere quite awhile ago that the 2litre turbo from later models of the duster could be modified to fit the slant six, never tried it but i heard from some slant six racer here in az that said it could be done
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#10
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haha,
ya, i think just about any turo can be placed on a /6 with a little pluming. I just dont know what else is needed like a fuel pressure regulator or a fuel pump that is boost regulated...?? also need to know what the best carb setup is; carb before or after turbo. btw dr dodge, is that your /6? That thing is a piece of art. I dont plan to go that far but at least i now know that i can go as far as i want. thanks |
#11
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I have been toying with the idea of a a twin turbo /6. I've already got one turbo off a newer chrysler and have found another. Right now it is just an idea, but if I could find a cheap 70 /6 duster I will really try to make it happen. Someone told me that you can put some sort of valve from fish tank equipment on the turbo and get 16psi out of the thing. I would love to stomp some big blocks with a /6.
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#12
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You found your test mule
Your in luck... I'm just going to start on my twin turbo 198 in the next few weeks..
I had two mitsh turbos given to me, I bought a /6 header flange on E-bay and I going to build a custom double or single 2 barrel intake or 4 barrel...not decided. I'm going to use a 2 barrl from a ford truck... it is a 500cfm unit.. If I go 4 barrel I will use a 600 holley jetted down.. As soon as I can't get the /6 in my back room on an engine stand I can start (I have a hurt back so it depends on when I've healed a bit..) The engine is going in a 1971 4 door Valiant.... they'll never see it coming. lol |
#13
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The engine in Doc's post belongs to Leighton and Tom Drake. It is in a '39(?) Simca.
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#14
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Thanks
1duster - Thanks for the kind words regarding the turbo motor. Dad really spent a lot of time working everything out. We have had the boost up to 14# with no problems. This is a STOCK motor. 8:1 compression , cast piston, stock 76 cam, stock rods...etc. The only thing we did is port the head. This motor made 282hp on the chassis dyno with 10# of boost. It is running efi and alcohol.
Get the book Maximum Boost and read it before starting. This book is filled with tons of good info. If you have any questions please ask and I will be glad to answer them. Tom Drake |
#15
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I just bought a '71 slant six duster for $100!!!! Car is in good shape but needs passenger front fender. It even has factory buckets and black&orange interior. So i gues this will be my project car. Also, my neighbor offered to sell me a trubo out of his chevy deisel truck for $25. That might be too much turbo for my engine, esecialy if i go blow thru, but atleast i know i have options. but damn, that turbo could probly pump out an easy 30psi .
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#16
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The head is plenty strong. You could have head gasket sealing problems with a turbo. I believe this is as much due to the heat that a turbo introduces as it is due to the boost. The major increase in cylinder pressure occurs after 60 percent of combustion is complete, well after TDC, the additional stresses on the bearings are not as tough as you would expect, unless you have pre-ignition, which can quickly toast the best motor.
An intercooler can help cool the fuel/air charge. A thick copper gasket and o-rings can help, so can replacing the head bolts with studs. I don't think you'll have a trouble with destroying parts unless you have pre-ignition. |
#17
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does anyone make strong head studs? also Ive heard that it is very hard to get a copper head gaskets to seal properly.
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#18
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everything you needed to know about slant six fasteners:
http://www.slantsix.org/articles/ARP...6-hardware.htm |
#19
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Quote:
ARP makes studs for everything. That's all we use in our race engines. |
#20
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how much stronger are they than other studs? Are they really necisary?
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#21
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You have to use a sealer on both sides of a copper gasket to make it seal. ARP bolts and studs are the best that's that. Studs are better in most applications. All professional racers like myself use them. And yes ,with a lot of boost they are needed. And will help seal the copper gasket too.
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#22
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well thank you dwc. Its things that i dont know about like head bolts that will hold me back. Thanks for the advice, you put me another step ahead .
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#23
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No prob. That's why we are all here.
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#24
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Temperature control!
"An intercooler can help cool the fuel/air charge."
Just run Alcohol it really takes the place of an intercooler. EFI doesn't hurt either. Tom |
#25
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Alchol wont take the place of an inter cooler. It takes three times as much alchol to produce the same amount of heat and power as gas does.
Efi does not create any hp just increased throttle response. Inter cooler will help create a cooler denser air charge allowing the turbo to be more effiecent. It will also allow a richer fuel mixture to be used creating more hp. |
#26
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yep,
I found an intercooler from a eagle talon tsi. I know they defienetly help out and reduce the chance of detonation. |
#27
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Yes they do. You can also get msd controls to lower advance during high turbo loads to save it on the top end too.
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#28
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thats what i plan to do,
So far i plan to use a msd boost timing controll and a fuel pump regulator that is boost sensetive. Im still not sure what i have to do to the 2 barrel carborator to make it blow tru safe. |
#29
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Impossible. Remember the Trans Am around '78 I think. It was a blow through the carb turbo. I could out run it on a moped. I went and test drove one and it could not light a tire much less pull it's on weight. These were 350's with 700 quadrajet 4v's on them.
Here's what I'd do. Make me a manifold to mount a 4 bbl. in front of the turbo then to the inter cooler and then to the manifold. If your running turbo's you will need a small four barrell instead of the two bbl. You could look into a preadator vary venturie type carb. That's the one that looks like a can opener. It might be the only one that could stand a blow through set up. |
#30
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i know a cupple people who are running blow thru 2...or 4barrels... im not sure, and i have also seen a setup like the one you just described, although i dont think it would be compatable with an intercooler
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