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> Official Sasquatch build thread Part 1, Cosmo Rotary Turbo... Then boom...
strawman
post Nov 22 2010, 03:02 PM
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When I was into MR2s (albeit the early models, not the turbo models), most guys were hot-n-heavy on single vs. twin turbos. I came to understand that the twin sequential turbos were overly complicated, but my memory ain't what it used to be...
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Mike Bellis
post Nov 22 2010, 03:36 PM
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QUOTE(strawman @ Nov 22 2010, 01:02 PM) *

When I was into MR2s (albeit the early models, not the turbo models), most guys were hot-n-heavy on single vs. twin turbos. I came to understand that the twin sequential turbos were overly complicated, but my memory ain't what it used to be...

Agreed, but for my target HP # the twins should work fine. If I decide to exceed this level, I will look at a single or making the twins Non-sequencial.
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Andyrew
post Nov 22 2010, 04:08 PM
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200ft lbs at what RPM?

How much tq will you have at 2k rpm's?

Curious how it will feel like in 2nd gear at ~ 15mph if you got on it..

However that boost rush will be AWESOME...
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Mike Bellis
post Nov 22 2010, 05:34 PM
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QUOTE(Andyrew @ Nov 22 2010, 02:08 PM) *

200ft lbs at what RPM?

How much tq will you have at 2k rpm's?

Curious how it will feel like in 2nd gear at ~ 15mph if you got on it..

However that boost rush will be AWESOME...

These little 1.3L turbos have more torque than you think. 200 ft lbs at 4000k. It is still more that a type 4 and same gearing. Who drives 15 mph in second gear? If I romp on it at 15 mph, I'll be in 1st! and rev it to 6k then shift. By that time I'll be doing 60mph as I shift to 2nd.

I had a NA rotary in my VW Bus. It was stupid fast with all that wieght and no turbo. I'll let you drive it Andrew, then you can decide.
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Andyrew
post Nov 22 2010, 05:59 PM
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Wait, your using the 901 as a 4 speed or 5 speed?

1st gear in a 901 wont net you 60mph.. At least to my knowledge. 2nd gear could do it.


By no means am I saying its not going to be fast, My fear is how usable/predictable it will be with that lag on mountain roads.
However max torque @ 4k rpms with a 7.5k redline is still pretty darn good. Thats just about what my Audi is.. except my Audi has a its torque a bit lower and about 300rpm smaller redline.. And I will say that it is 100% usable from 3k on up.
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Mike Bellis
post Nov 22 2010, 07:23 PM
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Here's some stock specks from turborx7.com

" The system operates off one turbo during lower RPM's (after 2,000 RPM) and the secondary turbo spools up after the engine reaches the 5,000 RPM level. "...
" The tiny 1.3 liter (two 654cc displacing rotors) power plant put out an incredible 255-hp, and 217 lbs/ft of torque, with the help of twin Hitachi HT12 turbos. "

This the US spec with all the smog equipment. When you remove the Ac, air pump, radiator fan, open the exhaust, improved intercooler, improved air cleaner... etc... I should hit my HP goal with little work. I will try not to port the engine as this will decrease to torque and raise the peak HP higher in the RPM range.

With these stock numbers, the car will be faster than my V8. (IMG:style_emoticons/default/cheer.gif) Don't forget, I removed an 800 lb engine and I'm replacing it with a 350 lb engine with more HP. The key is power to weight ratio. It should also be very nimble in corners. As far as mountain twisties? Keep the RPMs up, keep the turbo spooled. (IMG:style_emoticons/default/driving.gif)
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Lennies914
post Nov 22 2010, 07:25 PM
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Mike,
Do you already have a motor? There was a guy in San Rafeal on CL last month with 2 of them for sale. $350 for both. One complete and one short block. Also one in Hollister for $100 w/engine stand. I may still have email addy's if interested.
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Mike Bellis
post Nov 22 2010, 07:30 PM
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QUOTE(Lennies914 @ Nov 22 2010, 05:25 PM) *

Mike,
Do you already have a motor? There was a guy in San Rafeal on CL last month with 2 of them for sale. $350 for both. One complete and one short block. Also one in Hollister for $100 w/engine stand. I may still have email addy's if interested.

(IMG:style_emoticons/default/drunk.gif) It's on its way. I bought this one because it is complete with all the electronics.
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Andyrew
post Nov 22 2010, 08:32 PM
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Thats the way to go.. Hack up the ECU yourself so you have only yourself to blame..


How many miles are on that engine? Im curious how long the "little" turbo lasts.. It would be pushed past its efficiency range with the big turbo...
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jmmotorsports
post Nov 22 2010, 10:14 PM
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QUOTE(kg6dxn @ Nov 22 2010, 05:23 PM) *

Here's some stock specks from turborx7.com

" The system operates off one turbo during lower RPM's (after 2,000 RPM) and the secondary turbo spools up after the engine reaches the 5,000 RPM level. "...
" The tiny 1.3 liter (two 654cc displacing rotors) power plant put out an incredible 255-hp, and 217 lbs/ft of torque, with the help of twin Hitachi HT12 turbos. "

This the US spec with all the smog equipment. When you remove the Ac, air pump, radiator fan, open the exhaust, improved intercooler, improved air cleaner... etc... I should hit my HP goal with little work. I will try not to port the engine as this will decrease to torque and raise the peak HP higher in the RPM range.

With these stock numbers, the car will be faster than my V8. (IMG:style_emoticons/default/cheer.gif) Don't forget, I removed an 800 lb engine and I'm replacing it with a 350 lb engine with more HP. The key is power to weight ratio. It should also be very nimble in corners. As far as mountain twisties? Keep the RPMs up, keep the turbo spooled. (IMG:style_emoticons/default/driving.gif)
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What V8 that will fit in a 914 weigh's 800 pounds ?

Jerry
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Mike Bellis
post Nov 22 2010, 10:24 PM
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QUOTE(jmmotorsports @ Nov 22 2010, 08:14 PM) *



What V8 that will fit in a 914 weigh's 800 pounds ?

Jerry

A cast iron small block Chevy. That is the going wet weight. Google it.
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matthepcat
post Nov 23 2010, 05:41 PM
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Right on Mike!

I would recommend muffling the waste gate!!! Have you heard an open waste-gate? ouch ouch loud.

http://www.youtube.com/watch?v=GS2AnGXfkw0
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Mike Bellis
post Nov 23 2010, 05:50 PM
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QUOTE(matthepcat @ Nov 23 2010, 03:41 PM) *

Right on Mike!

I would recommend muffling the waste gate!!! Have you heard an open waste-gate? ouch ouch loud.

http://www.youtube.com/watch?v=GS2AnGXfkw0

Thanks Matt. Where you been? Did the car sell on CL?
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matthepcat
post Nov 23 2010, 06:16 PM
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No that was a moment of weakness. I have been lurking.

Let me know if you need a hand with your project.

How about a Lexus ISF motor? http://cgi.ebay.com/ebaymotors/2009-lexus-...=item35aba3673d

(IMG:style_emoticons/default/aktion035.gif)

J/k



QUOTE(kg6dxn @ Nov 23 2010, 03:50 PM) *

QUOTE(matthepcat @ Nov 23 2010, 03:41 PM) *

Right on Mike!

I would recommend muffling the waste gate!!! Have you heard an open waste-gate? ouch ouch loud.

http://www.youtube.com/watch?v=GS2AnGXfkw0

Thanks Matt. Where you been? Did the car sell on CL?
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Mike Bellis
post Dec 11 2010, 06:40 PM
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Not much to update. I've been collecting parts. Here's a pic of the cleaned and painted engine. I put my Iphone in the pic to give an idea of just how small these engines are. Picture a type 4 without heads and cylinders. This little turbo engine will make 350hp at 15 psi with 250 ft lbs @ 4k

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GT35R Ball bearing Turbo- oil and water cooled
HKS cast iron exhaust manifold
Haltech ECU
HKS Blow off Valve
HKS wastgate
HKS Boost controller
2000cc injectors (x4)
Areomotive fuel regulator
Custom Rails
4" exhaust
Aero Turbine Muffler
Frozen Boost air to water intercooler

Damn this conversion is getting expensive!
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RJMII
post Dec 11 2010, 10:20 PM
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QUOTE
GT35R Ball bearing Turbo- oil and water cooled
HKS cast iron exhaust manifold
Haltech ECU
HKS Blow off Valve
HKS wastgate
HKS Boost controller
2000cc injectors (x4)
Areomotive fuel regulator
Custom Rails
4" exhaust
Aero Turbine Muffler
Frozen Boost air to water intercooler



So are you switching to single turbo with the ball bearing unit?
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Mike Bellis
post Dec 11 2010, 11:08 PM
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QUOTE(RJMII @ Dec 11 2010, 08:20 PM) *

So are you switching to single turbo with the ball bearing unit?

Yes, Single. with new manifold. The stock twin turbos are nice in stock configuration but the single is far less complicated and will yeild more power. The turbo I'm using can get me up to 450-500hp @ 25+psi but I want the engine to remain reliable hence the 17psi max plan.

It will look similar to this one...
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Andyrew
post Dec 11 2010, 11:12 PM
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I still think your going to be pushing way more HP than that on a GT35R.... I guess at 15psi maybe... but that turbo is made to be pushed to like 35psi...
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Mike Bellis
post Dec 11 2010, 11:23 PM
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QUOTE(Andyrew @ Dec 11 2010, 09:12 PM) *

I still think your going to be pushing way more HP than that on a GT35R.... I guess at 15psi maybe... but that turbo is made to be pushed to like 35psi...

My boost controller allows a scramble mode and a dual boost setting. I may push it a little. The 2000cc injectors are big enough to support over 700hp. They were recommended by Turblown. The ball bearing should help it spool and the water cooling will help keep it from burnig up. It will definitely be capable of higher hp numbers than I plan to run normally.
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Andyrew
post Dec 12 2010, 03:17 PM
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Holy Shit, 2000CC? how many do you use? for the A4, 4ea 1k CC injectors an push 700hp..

HKS boost controller? Which one? We have an Apexi AVC-r boost controller on the 951 and the A4. Old technology but it works like a dream..
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