slant 6 turbo?

[finnman1]

ok guys, ive got a 74 dart w/ a slant 6 and i am not going to swap engines, but want to get her more peppy. ive decided to go the turbo way. ive done a crapload of research, but i guess im 'turbo illiterate'. i stumbled upon this website.. http://www.slantsix.org/articles/tur...bo-article.htm and i like the price and all, but i dont like the 16 second 1/4 mile time. i realize he's using the mitsu. turbo and its underpowered as it is. (i've got a shelby daytona). that attributes to the 16 sec 1/4 im sure, but what i need to know is; he's running no intercooler or anything like that. what gains would i achieve by running an intercooler? how would i even go about hooking this up plumbing wise? i mean, if you look at his setup compared to cars now a days, he's missing 800 components..intercooler, wastegate?, bov...etc. i want to have a decent 1/4 mile time, so i know i need something bigger than a mitsu., but i dont feel like spending 500-2000 on a turbo from a company. i like the junk yard idea as im a full time student working full time w/ a wife and 2 toddlers. anybody have any clues as to which items i'd need to help boost (no pun intended) the power better than 16 seconds in a 1/4? pluming ideas as how these are routed?
thanks guys

[whistlin']

That's pretty nifty! Honestly the cheapest way to to make that Dart quick would be to go with a lower gear ratio.
The turbo setup would definitely be more interesting. I think if I were going to do it I would get a bigger turbo or go with a twin setup like in the bottom picture. I don't know if a single Garrett would be enough or not, maybe with a 3" swingvalve it would.
I would go with a different induction setup. Might as well modernize it. Custom intake with injectors, throttle body and fuel rail, O2 sensor and stand alone system like a Mega squirt. Then intercooling. How much you do depends on how much you want to spend. One thing for sure, you've got lots of room to work with.

[Andre Parker]

Get a cheap HY35 turbo from a dodge truck with the cummins. That should make enough boost for you. Your gonna need alot more than that stock 1 barrel carb on it though. You really should think about fuel injection or get a 4brl carb and intake from clifford and have the carb set up for forced induction. The stock floats will probably crush from boost.

[finnman1]

I've done a lot of research on slant 6 racers...(11 second cars), and believe it or not, a four barrel is likely to over carburate since there wont be any head work done, i'm planning on using a 2 barrel w/ a custom adaptor plate. in now way do i want to fuel inject this, i need to keep it simple and cheap. i was wondering about the intercooler, what is a 3" swingvalve?, plumbing requirements?

[whistlin']

I think whether you run an intercooler or not depends on how much boost you plan on running. I have no idea what a slant 6 can handle.
3" swingvalve would be the exhaust outlet for the Garrett turbo. You mention using junk yard parts, the stock unit is 2.25 or 2.5, would be pretty restrictive on that motor. Like Andre said, the HY35 would probably work nicely. The 9cm exhaust housing would keep lag down but flow well.

[MrBelvedere]

dude that rocks go for it is alli got to say that wiukd be one mean sleeper let us know how it goes

[finnman1]

another question.... i stumbled upon this website, http://dodgeram.org/tech/dsl/FAQ/turbo_faq.htm and it shows the turbo specifications of the stock turbos; HX-35 n HY-35. it says that the max boost range will be around 18 psi, and the wastegate will be around 18 to 23 depending on what year. the question is...will i be running 18 or so psi just bolting this thing on?? that scares me... if so, can a boost controller lower it to 8 or so psi? more importantly, is 18 or so the preset psi this turbo will be putting out?? i know my engine cant handle that.
also, these engines come w/ a 1 barrel carb from the factory... im planning on buying a offenhauser 4 barrel intake and maybe a 390 cfm holley... will this allow me to run more boost? what is a good psi # w/ and w/o the 4 barrel intake n carb? remember, im 'turbo illiterate'

[Andre Parker]

The holley 390 cfm carb is a good carb to use on these motors. The 600 cfm is too large. You can adjust the wastegate on the holset turbos. They have a fairly stiff spring on the wastegate can, you may be able to adapt one from a turbo dodge to fit for lower boost. You could run 30 psi of boost with one. But a slant 6 wont hold up without some upgraded internals. I think the turbo from the turbo fords would be a good match too. Or maybe a super 60. I think that with stand alone and fuel injection, you could have one hell of a mean slant 6 if it were built properly.

[whistlin']

The 18 psi they talk about for the HX-HY 35 is what the Cummins gets in stock form in the Dodge. Whether you reach that or not depends on how well your slant six can spool it. That turbo is good for up to 35 psi, I've run 35 psi for extended periods at 1200 degrees with no problems in my Ram.
I don't think overboosting will be a problem, you can always rework the wastegate mechanisim, they are a simple design.
I don't know much about carburetors combined with turbos.

[Tim_K]

Go to www.slantsix.com and www.slantsix.org with these questions.

I've worked with /6's and built them. They are very tough engines. The guy who designed the /6 also designed the 2.2 / 2.5 !

I've personally seen /6 cars running 10's in the 1/4 mile. Nitrous, MPFI, Turbos, Alcohol injection, /6's can do it all.

But it'll cost $$$!

[TRRBOJEEP]

Take it fron a guy who's done what your talking about doing.... (turbocharging a n/a motor)... it will cost money and it will take a lot of time to sort it all out. I agree with the posters above that the Holset from a Cummins would be a good choice and should be sized about right for the /6.
There are a number of ways to back the boost down less than the factory wastgate setting. You will probably be limited to single digit boost, unless you get a set of forged pistons. There are factors that just work against you when you attempt something like this... things you might never think about. Like for instance "ring gap". The ring gap on a forced induction or N0S motor must be greater than a n/a motor due to the extra heat the rings see. (the more heat they see, the more they grow)

I'm not trying to talk you out of it, because I think anything unique is cool, but in the end you'll have every bit as much money in it as a motor swap, and if it isn't done just right, you may end up with an expired /6, and be back where you started. Intercooler, plunbing, oil and water lines to and from the turbo, mounting brackets, will all have to be custom made. If you've got the time, and the pacience, and the money, go for it. With the right rear gear, a decent motor, and 6-7psi of boost I would think the /6 Dart could easily pull 15's in the quarter, but if you want more out of it than that, you're going to have to do some engine work on the /6. $$$

Also, with single digit boost, you really don't need an intercooler or a BOV. Maybe just inject a little alky. It will simplify things for you.

[Geoff]

I have also done reasearch on turbocharging my slant six.
-Junkyard EFI conversion for the slant six
http://www.slantsix.org/articles/dib...conversion.htm
Turbo manifolds for the slant six can be found on ebay from time to time if you don't have the resources to make your own. The cummins turbo's are greatly suited to the slant six and you won't have to wory about spooling it with the 6's huge stroke(assuming 225). The internals in the /6 are extreamly stout and will handle enough power to put your car in the 12's if you wish...pistons are the weakness. Do some searcing on slantsix.org for other turbo /6's...there is are quite a few running efi turbo /6's on there. Intercool it and 14's should be easy.
-Geoff-

[G Daniels]

i got a bud who wants to turbo a slant 6 and drop it in a tube frame duster he has. clifferd makes there new intakes with injector bungs if u want to use FI. there was a kit he picked up from a guy at the nats a few years ago that the guy used on his barracuda told him that he gave many V8s fits with it. id think a little time and planning u can make a very streetable best.

[finnman1]

is limiting the boost to a lower level than 18 psi as easy as installing a boost controller? i dont want to mess with the wastegate. also, im going the carbed route.

[Geoff]

the wastegate arm has an adjusting nut on it..if you can replace a flat tire with your spare than you can handle it.