De-turboing my 2276

cotts · Posted: Sun Mar 20, 2011 10:48 pm Post subject: De-turboing my 2276

Hey guys,
I live in Australia and am a massive Volkswagen fan. I am not extremely technically minded when it comes to motors. I know enough and usually let shops do the hard stuff.

My setup:
- 2276 Cb performance 45drla fed turbo setup.
- Cam -Bug pack 4065-10.(268 degrees)
- Compression 8.8 to 1
- Heads are 044s port and polished with semi-hemi cuts
- Bug pack 82 mm forged counter weighted crank.
- Runs an MSD 6AL

Made 122hp at the wheels on 8 psi.

PROBLEM
No one in Australia knows how to tune this car like i want it. I have had a 2276 N/A that ran pretty similar power wise.

Question
What would this motor be like if i took the turbo system off and got a new exhaust.? obviously i would get the DRLAs tuned etc

Any feedback would be great

cheers guys

miniman82 · Posted: Mon Mar 21, 2011 7:40 am Post subject:

Only 122? Man, you should be making a lot more. Compression is sorta high for a turbo engine, have you verfied that to be correct?
_________________
Build thread: http://www.thesamba.com/vw/forum/viewtopic.php?t=212747

wompninja · Posted: Mon Mar 21, 2011 8:39 am Post subject:

This is what you do. Pull the engine and ship it to me, I'll pull my non turbo engine and send it your way. Problem solved.
_________________
Pics of my 1970 Satin Black Type 1 build

miniman82 · Posted: Mon Mar 21, 2011 10:40 am Post subject:

Sure you want to deal with the shipping charges to the AU?
_________________
Build thread: http://www.thesamba.com/vw/forum/viewtopic.php?t=212747

Dauz · Samba Member Joined: January 05, 2010 Posts: 1861

67Beetle2017 · Posted: Mon Mar 21, 2011 11:47 am Post subject:

I used and still refer to the "Turbomania" book written by Bob Tomlinson to tune any of the Dellorto turbo engines I built back in the late 80's to present.

This book is very clearly written and has many jetting examples that should steer you in the right direction. Cool

Unless you have very good fuel or only using up to 7psi of boost, 8.8:1 seems a little high. Nevertheless that should not prevent you from tuning your engine combo.

Before you remove your turbo, try tuning first.

Make sure your fuel pump and regulator are up to the job.

NOTE: I looked at the CB performance site and saw that the book is currently out of stock. Sad

Is this a single blowthrough or draw through system?

wompninja · Posted: Mon Mar 21, 2011 12:27 pm Post subject:

You should probably be getting close to 150hp out of that engine without the turbo on it so something is definitely wrong. What exhaust are you running now? Have you done a compression check on all of the cylinders? I would try and tune it yourself and see if you can get it better than the "experts" around you.

Here's a link to the turbo book.
http://www.amazon.com/Turbomania-Turbocharging-Eng...amp;sr=8-1
_________________
Pics of my 1970 Satin Black Type 1 build

Rohrheim · Posted: Mon Mar 21, 2011 2:09 pm Post subject:

I just bought Turbomania off Ebay for $18.37 shipped. Do a search. Seller has 2 left.

The Phil · Posted: Mon Mar 21, 2011 8:48 pm Post subject:

122 is damned low for having 8 psi on that engine. one of my friends has got a 2235 i believe it is, duel carb, not sure of the size, but hes got to be around the 185-200 HP mark in his buggy. also, it's not turbo'd. you might want to have that checked out.
_________________
"In case I don't see you, good afternoon , good evening, and goodnight."

My '66 Baja Build Page http://www.thesamba.com/vw/forum/viewtopic.php?t=456365

Free from the evils of facebook Dec 2012. No other Social Media.

cotts · Posted: Mon Mar 21, 2011 10:09 pm Post subject:

thanks for the reply guys!
The compression is 8.8. the engine was built by wayne johnson and featured in hot vws. It should be a beast of a motor but so far it would only run low 14s in my 865kg super bug.

I run it on 98octane fuel always.

With no turbo and the right tune how would this go? i cant image there would be much difference. Would the CAM be the only thing holding it back from being a decent street motor?

can give more specs and photos if needed.

Cotts

The Phil · Posted: Mon Mar 21, 2011 10:14 pm Post subject:

Umm, well it wouldnt be just the cam to make up the difference. in order for a cam to make a difference you'll need better lifters, better rockers. headers that allow for it breath better. its a whole chain of things. even at worst that engine should still be pulling at least 135-140 hp. its a big ass engine. like i said before for my friend, its a 2235 with around 200. but then again its also like a $3500 engine. you should be pulling sub 11's if you can shift that quickly and good enough. maybe higher 10's.
_________________
"In case I don't see you, good afternoon , good evening, and goodnight."

My '66 Baja Build Page http://www.thesamba.com/vw/forum/viewtopic.php?t=456365

Free from the evils of facebook Dec 2012. No other Social Media.

cotts · Posted: Mon Mar 21, 2011 11:22 pm Post subject:

complete stats:
2276cc
crank-bug pack 82mm forged,counter weighted
robs- pauter, stroker vs,shot peeled, new bolts
cima pistons 94mm
rings- total seal
cam- bug pack 4065-10(.364' lift, 269 degree duration)
Heads- vw 044 port and polished, semi him cut
valve size and make - 40mm x 35.5mm, manley

comp 8.8:1
MSD 6al ignition
blow-trough turbo by CB performance
Duel 45 DRLA's
exhaust CB performance (no muffler)

Boost 8 psi may spike to 10.

jfats808 · Posted: Tue Mar 22, 2011 2:09 am Post subject:

I just ordered a copy from Airheads for 24.90 shipped. They have 2 left. I just couldnt justify paying 30 bucks shipping Fedex for a 20 dollar book from a couple other places.
_________________
2276 IDA's 86C 11-1 DD

Steve Arndt · Posted: Tue Mar 22, 2011 8:40 am Post subject:

That cam has tons of duration for a street turbo engine. That is FK10 type duration numbers.

Hotrodvw · Posted: Tue Mar 22, 2011 8:49 am Post subject:

Too much duration for a turbo motor IMO...it's just bleeding off boost....cam isn't giving much lift either. You shouldn't need 98oct fuel with 8.8:1 c/r either....too much octane wil kill power too!
_________________
'67 Sunroof
Eric

78x94 with IDA's....oober fun

Horsepower is an addiction........Addictions cost
lots of money!

Hose & Fittings

Fall23 · Posted: Tue Mar 22, 2011 1:32 pm Post subject:

Have you checked for any boost levels? Leaks?

Dauz · Samba Member Joined: January 05, 2010 Posts: 1861

cotts · Posted: Thu Mar 24, 2011 12:59 am Post subject:

Hey guys!
Engine has been checked and doesn't leak boost. Have a boost gauge and it reads around 8 maybe 10psi of boost max.

I have never been told that to much octane can be a bad thing.
The guy i purchased it off told me that when he went to 15psi he used 110 octane in the states at the drags.

Wouldn't have though that cam is to big. Inst it similar to a engle 110 or something. Considering the capacity i thought the cam was relatively small perfect for turbos. But i don't know a whole lot about the issue.

C

Steve Arndt · Posted: Thu Mar 24, 2011 9:11 am Post subject:

We assumed you posted the duration numbers at .050" lift, not advertised duration.

MinamiKotaro · Posted: Thu Mar 24, 2011 3:17 pm Post subject:

What is your AFR under boost and what are you running for timing?
_________________
1967 VW Beetle
2276cc
MegaSquirt-extra v3.57
Check out my ongoing story.


Hello! Log in or Register \| Help \| Donate \| Buy Shirts	See all banner ads \| Advertise on TheSamba.com

Forum Index -> Performance/Engines/Transmissions		Share:
		Print View

	Forum Index -> Performance/Engines/Transmissions	All times are Mountain Standard Time/Pacific Daylight Savings Time
Page 1 of 1