Skip to main content

Replies sorted oldest to newest

I'm running a T3/T4 hybrid turbo setup with fuel injection and ignition controlled by Megasquirt and the speedometer climbs just as fast as the tachometer does. 120mph flies by in no time at all and several big muscle V8's have seen nothing but the rear end of the car when they think I'll just be eating their dust.

 

15psi in a 2276 equipped Speedster is crazy fast....

 

Looks like a T4 turbine in your pics. What size engine and header are you running?

Good eye, it is a t3/t4 turbo. I'm running a 1 5/8 A1 sidewinder on a 2165cc. nice CB heads, 8.5 comp, and adjustable boost 3 settings in all. from a small amount of 5-6lbs to 14 lbs of boost.

 

From everything I understand the inter cooler should be good for another 30hp.....

 

Can't wait to see how it all works out with my Porsche 915 5 speed and my Mendeola Performance suspension. It already flew with my 2276 and 48 idas now I think it might actually be scarry fast.......

 

You'll definitely have a ton more power over the 48's. Were you running higher compression with the 48's? What cam are you running?

 

My 2276 runs 8.63:1 compression through CB 044 CNC round ports and my current cam is an SLR XR302 which is very similar to an FK8. I don't have an intercooler but I do spray methanol just before the turbo and just after the throttle body when boost pressure is above 8psi. It seems to be very effective at keeping the intake temps in check as you can see the temps take a nose dive on the datalogs when the methanol starts spraying.

 

Looking forward to your results and would like to see more photos of how you are installing the cooler as it may be an upgrade that I could be interested in for the future though I'm not crazy about all of the additional hardware that needs to be installed to support the flow of cool water through the cooler.

It actually handles the power very nicely. The suspension was originally designed to go under our S2 Manxters, that have a 330hp Subaru 6 cylinder putting out around 250lbs of torque. With half this much hp in my speedy with it's old 2276 with 48 idas it handled very good at high speeds. So to say I can hardly wait to drive it like this is a gross understatement......

 

As far as the pooping in my pants, I've already bought the diapers for the first drive....

Kevin's car is a beast.  I had him do some welding for me on my 901 transmission so it would mount in easy and I got a chance to ride in his car.  This was his other engine but man it rode really nice.  In my car this new engine would be a death trap but his suspension is more inline with the new Porsche 911.  

 

When is this thing going to be ready?  It would make for a great gopro video.

Last edited by hbkmat

I'm hoping to get everything done in the next couple of weeks then tear everything down and coat everything. I'd be totally up for some gopro action and some fun runs.

 

I whipped up a turbo exhaust pipe after work today. Tomorrow I'm mounting the waist gate and running an exhaust pipe off of that into the main pipe after the turbo so that everything looks clean under the back. Then it's time to plum the intakes and water system......

 

Oh and Jim, this car will be seeing some serious track time, I'll let you know.

 

 

aa new copy 2 share [4)

aa new copy 2 share [3)

aa new copy 2 share [7)

aa new copy 2 share [5)

aa new copy 2 share [4)

aa new copy 2 share [3)

aa new copy 2 share [7)

aa new copy 2 share [5)

aa new copy 2 share [6)

a new copy [6)

Attachments

Images (6)
  • aa new copy 2 share (4)
  • aa new copy 2 share (3)
  • aa new copy 2 share (7)
  • aa new copy 2 share (5)
  • aa new copy 2 share (6)
  • a new copy (6)

Looks great! I highly recommend you add some support braces to hold that turbo up,if you hit some bumps in the road,that thing will fall right off!!! 

  If you want a SIMPLE system to tune that and make big power......   www.sdsefi.com

 I have used this on water cooled VW's and it worked unreal and is very reliable and EASY to TUNE. Be careful with tuning,aircooled motors don't have that safety margin of water cooling to take away heat,which more power will produce,you have to be very careful and creep up on the tuning,it is VERY easy to melt a piston!!! 

Do you plan on adding a deep sump? My car ran fine without one until I turbocharged it and it would accelerate hard enough and fast enough that the oil pressure would start dropping rapidly around 6500rpm in 3rd gear.

 

My case is an aluminum super case with the bubble top and the oil wouldn't return to the sump fast enough so I had to make some modifications inside the case and add a 3.5 quart sump. My turbo is mounted up just a bit higher than the crank pulley and it drains into the top of the added sump. Looking at your photos, it is hard to tell if your drain will be below the sump or not which is why I ask if you plan on adding one or not. Many people run a separate pump for their drain to get the oil back into the engine and to keep it from overfilling the turbo cartridge but I think those are extreme cases where the oil would have to flow uphill to get back to the engine. Just curious and am really looking forward to seeing another turbocharged Speedster.

 

I have no experience with SDS but have heard great things about it. I've been running Megasquirt for a couple of years now and really like the features. The tuning software (Tunerstudio) has an auto tune feature which will automatically tune your setup based off of your target AFR's and any given RPM and load. I've been able to accomplish a 25mpg average with my current tune on a 25 mile daily commute, 1/2 of which is city and the other 1/2 highway. 1/2 of the ride is cruising and the other 1/2 is with my foot on the floor for just as long as I can keep it there so I'm very happy with the way it is set up and luckily I have not had to do anything to the car other than change oil and keep the valves adjustments in check.

 

Your work looks awesome and again I'm looking forward to seeing the rest of this build.

Originally Posted by hbkmat:

I have seen a few projects from Kevin and all of them are top notch.  Was this the engine sitting on the bench last time I was over there?

 

Sorry for the newb question but I dont see a muffler?  How loud is this thing going to be?

Thank you for the kind words. As for noise, the turbo acts like a muffler and breaks up the exhaust pulses. Basically it will sound like a Subaru turbo with a deep rumble type sound.

 

 

AS for sump or no sump, not sure yet. I am running a dry sump system and intend on picking up the turbo oil with this system. I'm also looking at putting in an electric valve that will keep the turbo from filling up with oil when the engine is off. I've got the latest version of CB performance's fuel injection. I'll let you guys know how that works out.....

 

I've got a two stage boost controller so I'll have three preset boost levels. 5lbs (regular spring pressure, a low setting by the controler of 8lbs and then a high setting of 14lbs...... The last one is just for racing.......

I like the SDS because there is no laptop and the controller is easy to use. My personal turbo car was a 2 liter 16V VW motor and with a GT3076R I got dynoed 445whp out of it with 28 psi boost. Since the SDS was SO EASY to use,that is what made the tune so good,it is easy to make adjustments on the fly with no computer laptop shenanigans. 

 I hope you have stout rods and forged pistons,and get some good injectors with a good spray pattern. 

Is that a .63 a/r turbine? That will give you spool kind of late on that engine but you will have less rod damaging tq. with the bigger a/r turbine. If I were to build a turbo a/c VW I would have used a .48 a/r turbine on a GT2871R ballbearing turbo,that would give you full boost around 2500 rpms or so,with the bigger turbine you may have very soft 1-2 gear and not hit full boost until 4K or so rpms. When you get her running tell me when your boost hits tp see if I still remember what I am talking about or if I am talking out my ass. I have built over 3 dozen custom turbo cars in the past when I was a hotrod shop,and have experience with turbo sizing in relation to small displacement engines.   

You are right about that JamesBondSilver. I originally had a small T3 on my setup a few years back and it would build full boost fast but would peter out around 6000rpm. When I upgraded the turbo, I initially installed a Turbonetics T3/T4 with a .63A/R turbine and a Super50 trim compressor. With the cam and compression I'm running, my engine has lots of low end torque so I "thought" that the .63 turbine would be perfect for my setup but I started missing the extra low end grunt from the quicker spool that the smaller turbine provided. I eventually got rid of the .63 for a .48 turbine but kept the larger T4 compressor (different trim and I don't remember the number off the top of my head) and am much happier with the smaller turbine.

 

The only "small" downside to the quicker spool-up time is that it is way to easy to break the tires loose but it sure is a lot of fun.

 I know exactly what you are talking about. I try to tell the NA guys that sizing a turbo is like sizing a cam,you have to "give to get". It is really cool because you can size it and make your engines behavior totally different.

 To coolrydes,what kind of cam do you have in there? A conservative cam is best for turbo with high lift short duration/small overlap. A large overlap cam will kill your spool and you will have some exhaust gas reversion. You can make a turbo engine scream even with a mild cam.  

Flying? But of corse, otherwise I would be getting speeding tickets all the time. If my wheels are not touching the ground then I should not be held to earth bound vehicle laws

 

Mr. Bond I'll keep you informed of what it turns out like. When I layed this engine and turbo out I tried to keep in mind it was a street car that I wanted to drive and race (not the other way around)  It does have a turbo grind cam set up for this turbo and engine size. I would have to pull the specs on it as it is not just an off the shelf cam.

 

Christmas and snakes?

 

Here is todays moch up so far.......

 

turbo motor 051

Attachments

Images (1)
  • turbo motor 051

Ron, 56 speedster, & James I humbly thank you for the compliments. Yes that is a breather box.

 

Here is yesterday's progress. Mostly tig welding alum, time consuming and a pain. Not much different from the last photo but the welds and the BOV location. I put it close to the engine comp grill so that everyone can hear the wooosh sound when it blows off pressure. Kind of like a snake hissing...... muhahaha... Next to start plumming the cooant system for the water exchange intercooler....

 

If any of you guys and gals out there in speedster land want a custom engine, or other parts for your speedsters to give them that extra little something, I am currently doing private work.

tporsche 040

Attachments

Images (1)
  • tporsche 040
Post Content
×
×
×
×
Link copied to your clipboard.
×
×