92 z28

hey, my friend has a stock eclipse turbo. if he was going to give it to me would i be able to get it onto my l03? or would it be impossible, or hell trying??? thanks.

trans slam

Those turbos are way too small to use as just one on your engine...you could try two.... the exhaust housings and the down pipes are undersized. Wouldn't be worth it.
I take that it's a 14g? .

92 z28

14g?? i think he said its a 16 psi or something.. what do you mean its to weak? i wouldnt see any or not enough improvements?

Greasemonkey

14g is the type of turbo. 16psi on that doesn't really mean much, you're looking for airflow. Like was said before, you really need two to make it worthwhile.

trans slam

If you get two it'll spool quite fast. May even run out of breath in higher RPM. You could run for instance a larger turbo on the same amount of boost and have more HP. The 14g turbo that you might have there is good for 16 psi or more but cetainly not recommended for L03 engine. knock it down to below 10psi if you decide to go w/ two or even another type of turbo(s).

92 z28

so basically you guys are saying not to go with the eclipse turbo?

Cronic3rd

I looked into building a TT setup with DSM turbos(I looked at t25s) And pretty much concluded that they are too small even in a twin setup. Shrug one of the turbo gods that float around here even went as far as to say that he doubted that the engine would even run with all of the restriction from the turbos.

MrDude_1

you have to remember, its all about displacement.

even a small 305 is 5.0L...... about twice what most 4 cyls are.

what would be a huge turbo for a eclipse, would be small for a V8.

92 z28

yeah, thats what i figured. thanks.

Cronic3rd

Actually a 305 is like 2.5 times or more larger than most import 4 bangers. How many 2.5l engines can you name? Now how about with a single turbo? Now if you look at something link a turbo T-bird it has a 2.3l turbo and those work great in a TT setup for a 305/350. Or something like a GN (3.8l T). Just take turbos off something around 2.5l and run with it.

FlamedROC

So could you mate a DSM turbo with say a 3.8 turbo from a GN for a TT set-up and still have a nice gain? I just picked up a free DSM turbo and I'm lookin into gettin a bigger turbo to take over higher RPM power. The reason I took the DSM turbo was the fact of havin a small turbo to improve turbo lag by spooling faster then having the larger turbo take over for higher RPM power!

Jason

BTW Im not lookin to make much boost...like 8-12 psi

stevedave454

i might be misunderstanding you, and im not sure what you mean by "mating" but if your talking about running one dsm turbo, and one 3.8 turbo it wont work.... you need the same back pressure on each side of the engine, the only way to run two different sized turbos is to run em in line... setup like a single into the first turbo, and then that exits into the second turbo... but the problem with this is that the smaller turbo will spool fast, but runs out of efficiency, and becomes a huge restriction in the upper RPMs, my understanding is a dsm turbo (T25, T28, 14b, 14g) would probably be spooled at 1500 rpms, and would be all done around 4000, maybe less... because it cant flow enough air for a 350 at that high of RPMs, i mean an eclipse is 2.0 liter right? well thats 122 cid.... so even if you have two of em it'll support a 244 cid motor (thats mostly stock)... so for all you V6 guys two of these would probably work great, for the V8 guys you need something bigger

iroc-ice

Would it be worth turbocharging a 305? Like would the power gains be worth it? Or would it just be better to get a 350?

FlamedROC

Good point!!! Thanks well I think seens how I have a 3.8 turbo already I may as well get another 3.8 turbo. Will this be to much or just right for built 356...I wil of course rebuild the motor to accomidate the turbo...Meanin I will drop the compression back down to 9-9.5(Currently at 10.5) and stiff head gaskets...coat the the pistons etc.

Jason

stevedave454

i dont know much about the 3.8 buick turbos, but i do believe two of them on a v8 would be pretty crazy! as long as you can spool em... you might not be able to... also i would recomend something like 8.5 compression.. especially if running two large turbos like that... you can run 9.5 or so compression, but you gotta keep boost at/around/under 10 psi if you want your engine to live a "regular" amount of time. do some research, if you can spool the 3.8 turbos great, use em, if not i'd say get some t-bird .60/.63 AR turbos from the 2.3 turbo coupes, and run 8.5-9.0 compression. also you will need some good intercooler(s) (most stock ones wont be sufficient), im going to be running the t-bird turbos, and i want to run them both into a single air/water IC, with one outlet to the TB

FlamedROC

well I have a pretty stout 356 so I may be able to spool em but I guess I shouldnt push my luck. Im not lookin for alot of boost I'd say 10psi max! hmm yea I've heard that those are the way to go. I have been researchin these out but not good enough I guess well on goes the search...lol

83 Crossfire TA

iTrader: (2)

You know, sometimes I just don't get the BS that people post, everybody would be better off if they sat down and did some research before saying anything.

- saying "I've got a DSM turbo" is just barely one step better then "I've got a turbo." It could range in size from something so small that it won't work well on just about anything in a normal street car to so large that it wouldn't.
- I've said this dozens of times "I just want to run low boost" does not make things better with a turbo. Typically the widest part of most turbo compressor maps is in PR's between 2.5 and 3.5 (roughly 22-37psi). Below that they move less air and you need a bigger turbo to move the same amount of air at the lower pressures that most gas engines will tolerate
- Has anyone ever actually tried looking at any of the Mitsubishi compressor maps? To start with, they are efficient in a much lower PR range then most other turbos (good thing for a gas engine… really good thing, I'm guessing that they are the only common turbo that was designed from the get go for a gas rather then diesel engine). Second, something like a 14G flows ALMOST EXACTLY what a 60/.63 T3 at a PR of 2:1, and MORE everyplace below that. That being the case I think a pair of them would be a KILLER combination on a 350 making under about 650-700hp. I suspect that it would be slightly large on a 305, but one of the smaller turbos would be just perfect, and from what I've seen, for the most part, they would spool better then most comparable T3's.

FlamedROC

well fine here, its a TD05H DSM turbo...I've tried researchin for the past week tryin to find if this will be a good canidate. Tryin to find DSM boards and the like seemed hard to find will little or no info for what I am doin. it may be to small even with 2.

And if ur that upset at some of these posts then dont bother postin ur nonsence BS of wine, that u have to keep repeatin yourself! Keep it to ur self and avoid the post otherwise help us less informed out so maybe we can be pushed in the right direction. Good info but we can do without all the wining about how this topic always come up!

83 Crossfire TA

iTrader: (2)

For the time being I’ll ignore the fact that you appear to be a rude SOB (and suggest that you reread what I wrote and ask yourself what was actually directed at you and apologize)…

Saying “it’s a TO5H” only gets you only about as close as calling a car an f-body… it could still be an ’82, 4 speed manual 2.5L Iron duke firebird, a ZL1 Camaro or a RAIV TA…. For what it’s worth, most DSM’s came with TD04’s (did any of them even come stock with a TD05?), and the TD05’s appear to start at about the size of a 60/.63 T3

stevedave454

there, there.... shut up everybody(j/k)

well i'll apologize for my ignorance, but help me to gain some knowledge on turbo sizing basics... right now all i really know is you can use the general rule of thumb saying if it came off a 2.5 liter then two should feed a 5.0 liter nicely

what are some basics for measuring turbos?

where can i find out how to read compressor maps?

i and many other have asked "what turbo's work good" and i always hear either a list of just about every turbo you can find in a junkyard... and while you can use almost any T3 (in a twin setup on a V8) some suck, and some work great... how about a smaller list of what works very well on a basically stock 5.0 or 5.7... the other answer i get a lot is the .60/.63 ford turbos, so thats what i set out to buy, and while they are proven to work good, your saying some 14g's would be killer on a 350 for upto 700 HP - thats more HP than i've heard to expect from the 60/63's that everyone recomends, so why haven't i heard this before?!

and lastly what did the 14g's come on (years of eclipses) cause i've always heard T25's on the 1G's and T28's on the 2G's... i've also heard 14b... is there really that many different turbo's for the same car, or does the same turbo have 4 diff names??

FlamedROC

Actually Im not a rude SOB and I try not to be, as a matter of fact im done with the complainin part here gets us nowhere.

well maybe this helps ya with the turbo I have...49178-01??

help at all?