need help with displacement and turbo size...

[Bob Mosaic]

I have a Holset turbo and the specs are.... Impellar- 86 mm main diameter 60 mm inducer diameter 7 main fins and 7 secondary fins Turbine- main diameter 65 mm exducer 58 mm 12 blades A/R 1.57 cm2/cm I am thinkin 355 ci or less will be fairly accurate for this single setup. With the more research I do a destroked 350 (315-330 ci) seems better fitting. The turbo was designed for a 6 cyl. 5.9L cummins diesel. But gasoline engines produce hotter exhaust temps and higher velocity and RPMs. Any advice is appreciated. Cheers, Robert

[neverendingproject]

i believe that would be an hx55. that would not be a good choice for a single. it would however be a monster dual set up.

[Bob Mosaic]

It is a HE351 W??? I believe. 4inch inlet and a 2.5 inch outlet on the intake side. Exhaust is a tiny 2x 1.5 inch inlet and a 4 inch outlet.
Lemme know your additional thoughts.

Thanks for the advice,
Robert

[Bob Mosaic]

one more thing...


On a comparison to a Garrett setup this seemed to be on the threshold of a touch too small.

[Baldturbofreak]

Get a TV-81 (aireaserch) off a detroit 8V-92 (and some 6v-92"s) They have a 80mm inducer Dia. Good for about 8-900hp with a 3200rpm boost threshold. Ive been running one for a year and it works very well on a 350. You can find them for cheap as hell on e-bay, or your local diesel surplus yard. I bought mine for $117 shipped, and it was brand new! :party:

[lcvette]

Baldturbofreak...ya gotta give up your source... i need a TURBO..gotta gotta gotta gotta have it gotta have it!!lol seriously I am looking for turbos right now and was looking at teither the PTE67 or a T66 or T72 turbo for a single application... how big is the turbo your running physical size wise... and how does it compare to the models i listed above? sorry for hijacking your thread Bob, i NOW RETURN YOU TO YOU TO YOUR REGULARLY SCHEDULED PROGRAM..

:D

CHRIS

[Bob Mosaic]

You really can't beat the price of my turbo...FREE with a 100k warranty, brand new. I may be able to get a larger one or another to run two monster twin turbos. Truthfully, I would rather have a single huge turbo.
Thanks a mil,
Robert

[lcvette]

Bob,

I agree with you 100%, I am definately going the single route after seeing what the guys on the Fbody forums are doing. what I would do is compare the turbo you have to a T66...if its relatively close I would bet safe to use it in a single application. this is the starter size turbo for all their single kits. the upgrade is to a T76 which is producing monster numbers. I myself am not after the most horsepower I can get.. 550rwhp-600rwhp would be better then I expect for the setup and I would be elated with these results and a nice driveability in the car.. this is my goal! hope this helps!

Chris

[Bob Mosaic]

i am going to try to go with a larger turbo...I do wanna make rediculous power numbers. I will be happy with 800 rwhp, and mile long burnouts...lol. I am on a mission to have a 220+ mph vette to kill porsche 996's.
Cheers,
Robert

[Rkreigh]

a T78 would be killer.

I would love to get some help with the manifold/plumbing fabrication.

you interested btfreak??

a single turbo car with the turbo mounted up front and high enough to gravity drain on an LT1 automatic car is what I have in mind. Build a nice 4 bolt block with 8--1 pistons, a nice mild stock hyd roller, with better valves/springs.

not much room in the c4, but it does sound feasible.

I'd use the stock computer with either a 034 or megasquirt with another set of injectors plumbed into the intake somehow for additional fueling.

anyone good enough with tuning the factory ecm on the 94 to just use 50 lb injectors???

I love my turbo buick but a nice 800 rwhp turbo vette is just what the doc ordered!!

I have lots of turbo experience but am lousy at fabrication.

how about it??? anyone know of a good builder that could seriously do this without killing the budget??? say for under 20K???

thanks!!

great goals bob, I believe 220 MPH would take ALL of that 800 rwhp because of the drag, but I bet it could be done. LPE built the "c4 SB2" car that did 219 with less hp, so why not!!!

[Bob Mosaic]

My car is very low, with a little less drag and som other aero help may be in order. Callaway had a 900+ hp TT setup running 254...yes, the SLEDGHAMMER!!!! Either way 220 mph has a certain jingle in my ear. Also, I wanna run the gumball 3000 or the players run within a few years. So, perfecting 800+ hp in a year or two is my goal. I may have to bite the bullet and buy a new garrett and part ways with this holset setup. All in the name of speed.
Cheers,
Robert


ps- fabrication is half of the fun...I am pretty good and look forward to fabing it all out.

[Baldturbofreak]

I'm interested. If your serious, I could arrange for it to be outfitted at Corvette's etc. in livonia, ny. The shop is owned by my uncle, Steve Eichas. He has over 30 years of experience with the vette's including the mighty Zr-1.
A few questions,
1) Will you be doing the tuning? I don't have a chassis dyno. But kennedy's Dyno tune is just an hour away. We have outsourced to him before with a 578rwhp result. Very reputable, and he has much experience with the Lt1 ecu's
2) What parts do you already have?
3) Does the budget include the driveline upgrades you will need? I have much experience destroying 700r4's in my youth, the 4l60 is not mechanically any different.
4) How important is air conditioning? IF it is important, do you have electic air or the standard?
5)For 800 rwhp we will need a T-88 with a thumper frame. Or a GT45R. Preferably the latter.
Email me privately if this is something you would like to persue , and I will crunch some #'s. :chevy


[Modified by Baldturbofreak, 8:39 PM 1/27/2004]

[SloRvette]

Where have you come up with the info on the Gt45 ? The largest Garrett lists in their online catalog is the Gt42, which is a 74 mm minor diameter. I'm trying to spec a single turbo with an 80mm compressor inducer diameter that will flow 120-130 lbs/min at a 2.5 to 3 pressure ratio.

[Rkreigh]

I'm definitely serious. I haven't got any of the parts yet, and haven't even decided on doing a zr1 vs an LT1. leaning towards the LT1 as maintenance and tuning is much easier, and it's a much cheaper platform to build. HP with either will be killer.

here's my thoughts,

a dart "motown" long block, with the good rods/pistons/heads
their "motown" crate engine would work well and save some costs with the build up and be much stronger.

a nice T72 or T88 for some big HP!!!

would consider twins like meaney did, that would probably involve sacrifice of the A/C but oh well.

probably a newer 480LE would be needed with another tranny controller. or an older turbo 400 with the gear vendors OD box. expensive but very stout. not wanting to do a stick, as it makes hooking the big HP easier IMHO.

tuning could be done by turbo people, or Jim Smith at SGC. willing to transport the car if needed. this will be a big part of the project, and requires very specific expertise with either the factory ECM or the chosen aftermarket EFI.

a dana 44 with the "super dana" viper gears (3.73) I think would work well. might even do a solid axle/parallel streetable 4 link if needed to make the car "drag biased"

maybe some CF on the drive/half shafts, the factory independent rear does start to become more of a liability!!!

still undecided on whether the factory ECM will do it or not. leaning towards an Accel 8. Jim Smith mentioned he could retain the factory ECM and "turn off" what is needed to allow the dash & other c4 functions to still work, and still use the aftermarket computer for the engine management. expensive, but probably a better idea for running variable boost levels with a speed density system.

I need to work out the "shopping list" and the best design along with the labor costs involved. it will likely be a pretty scarey number but I am sick and tired of waiting for the tuners to step up and do a c4 kit. it just amazes me that with the number of c4s on the road that nothing exists yet. been hearing about them for years, but still nothing!!!

or I may just buy a nice callaway and be done with it. you can buy a callaway cheaper than you can do the build up, but not too many of those have been "hot rodded" to make the desired performance.

looking for a pretty solid 9 second vette with no nitrous, which is a pretty lofty goal for anything even resembling a street car.

my turbo buick tickles 10s and is a daily driver, so my thoughts are that a twin turbo v8 should be able to better those numbers or it's just not worth doing.

save me from my turbo supra lust. tired of seeing those dyno queens post the big numbers and steel the thunder from the vette guys!!!

another crazy option is my old BB 427 vette. the car is again up for sale for a low $$$ which would provide a pretty cool platform to build out. it could be cut up and butchered any old way and would not require any computer shennanigans.

\thanks for the offer btfreak. you have some great skills and I have been consistently impressed by your very sharp posts and willing to take the plunge and dive in!!!

I will email you to see what might be possible. no hurry, I've waited 3 years as is, another couple wouldn't be a problem. :cry :nonod: :D

[Baldturbofreak]

MY apologies on the typo, I meant GT42RS http://www.atpturbo.com/root/turboin...p/gtlineup.htm
Reportedly capable of 1000hp.
IM in the same boat as you, the 42 isnt quite big enough, and the 60 is slightly too large at lower boost levels.
Im going to call turbonetics and see if one of their thumper frame compressors and housings will fit my TV-8. Probably in the 101mm inducer range.

[Baldturbofreak]

Well, in that case, Id say sit tight and wait until my new motor is in and I have all the bugs worked out. Since my 95 is no different manegment wise, than your 94 is everything that I do will apply to you. The mototwn is nice, buit it's not a reverse flow block (not a true Lt1) I wanna keep my Lt1 so my engine builder will do evry trick he knows to make it stout (the block I mean) All the rotating assembly is 4340 eagle with Speed pro pistons in 8-1. The 4l80 is a good choice, as the 4l60, while doable, will require more maint. and a ginger foot on slicks.
When everything is all said and done, and has proved it's duability (haha something I excell in -testing durability)Then I'll just build you a clone of my car. All 1300hp worth :reddevil

[Baldturbofreak]

Here ya go man, this will do one hell of a job for ya. http://cgi.ebay.com/ebaymotors/ws/eB...tem=2456939515
Pretty reasonable to on the price. :cheers:

[SloRvette]

How'd I know you were going to post that link from Ebay. :lol: I saw that one last night. I've already got an Innovative Gt88 for my V6. I'm looking for an 80mm max inducer size because of class restrictions. I'm thinking about a V8 combination which has a limit of 80mm. Realisticly I'll need 1200 to 1300 hp to be competitive.

I ran an out of the box Gt42 with the larger trims and A/R's on my V6. Was able to go 117mph in the 1/8th, 147.5 in the 1/4 in a 3350 lb car. There was still some left in it. I'd say it really is a 1000 hp turbo and if you run a ram air to it it'll do more than that. Plus the divided tangental exhaust housing made the spool up phenominal.

Garrett's wholesale price on the GT60 is more than a Turbonetics Thumper 106. The GT60 has a 106mm inducer diameter. I'm pretty sure that the GT60 is what's now being refered to as a large frame 106.

[Baldturbofreak]

I currently run a TV-81, (off a 8v-92 detroit #R5102353) It has a 80mm inducer bore with a 111mm backwall. I don't yet know the limits if this turbo, only the limits of pump gas and 10.8-1 hypereutectics. I'm gonna push this for all she's worth when I plop the freshened turbo prepped Lt1.As long as It makes the #'s I want without generating some intake temps I don't I'll keep it. I wish I could give you some hard #'s but the winter came before I had enough $ for the twin disc, so all I did was slip.

[Baldturbofreak]

What class are you running in? If you limited to 80mm inducer, then Id say the direction would be to have the lowest TIP/MIP ratio possible. Since Im assuming this IS drag racing (my fav) a higher boost threshold isnt a big deal. try and design a set of headers that are more typical for an atmo motor, definitly with a thumper flange. and use the largest trim and a/r hot side possible that will still produce your required boost levels. That way you'll (hopefully if it's all speced out right) get crossover (more boost pressure in the intake manifold than in the exhaust side) before your usable rpm range.
Also Id say rock a pair of these 6"x10" water/air intercoolers.
(LIke I do). They flow nearly a 1000cfm each with a very low drop, small, and pretty cheap. 2000cfm=1700+hp so it leaves room to grow. A little ice gives even more hp. http://www.absoluteradiator.com/Inte...s.asp?idDept=9 :cheers: