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slayer61 Samba Member

Joined: June 01, 2021 Posts: 1398 Location: TX
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Posted: Sun Dec 21, 2025 9:15 am Post subject: Re: slayer61 finally has a Dune buggy! |
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So, I'm bound and determined to not grenade my motor again from detonation. At present the boost is limited to 5 pounds. The NA motor was quite happy at 32 degrees BTDC. Because the deck is much tighter, I have backed the off boost timing to 30 degrees BTDC. I have also changed my boost timing to 17 degrees BTDC at max planned (10 psi) boost
Like this
Am I missing anything else from a "starting" tune? _________________
| Cusser wrote: |
... Most folks are idiots when it deals with electrical !!! |
| 67rustavenger wrote: |
3/4 race cam? What's missing, one of the lobes?  |
Paul
'68 Manx clone... Sears??
RLR/Strange brakes
2276 built on AS21 case
W-125 w/ GB 1.25:1 rockers
Mahle forged pistons
CB 4340 crank
CB H beam rods
deep sump
45 DCOE
Garrett turbo
Tim's stage II turbo heads
MSD Box and distributor
Car Craft turbo header |
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slayer61 Samba Member

Joined: June 01, 2021 Posts: 1398 Location: TX
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Posted: Fri Dec 26, 2025 2:20 pm Post subject: Re: slayer61 finally has a Dune buggy! |
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My wife is the best shop assistant ever! She helped me get the motor down onto the lift table and back into the buggy! Thanks Mrs slayer!
_________________
| Cusser wrote: |
... Most folks are idiots when it deals with electrical !!! |
| 67rustavenger wrote: |
3/4 race cam? What's missing, one of the lobes?  |
Paul
'68 Manx clone... Sears??
RLR/Strange brakes
2276 built on AS21 case
W-125 w/ GB 1.25:1 rockers
Mahle forged pistons
CB 4340 crank
CB H beam rods
deep sump
45 DCOE
Garrett turbo
Tim's stage II turbo heads
MSD Box and distributor
Car Craft turbo header |
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| Back to top |
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slayer61 Samba Member

Joined: June 01, 2021 Posts: 1398 Location: TX
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Posted: Sun Dec 28, 2025 1:44 pm Post subject: Re: slayer61 finally has a Dune buggy! |
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Systems are being checked off.
Mounting hardware, done.
Oil system, done, but I left the filter off to remind me to add oil.
Turbo and balance of intake system, done.
Throttle cable, done.
Still need to finish fuel line and A/F sensor connection, then we do loop checks and system checks before start up!
_________________
| Cusser wrote: |
... Most folks are idiots when it deals with electrical !!! |
| 67rustavenger wrote: |
3/4 race cam? What's missing, one of the lobes?  |
Paul
'68 Manx clone... Sears??
RLR/Strange brakes
2276 built on AS21 case
W-125 w/ GB 1.25:1 rockers
Mahle forged pistons
CB 4340 crank
CB H beam rods
deep sump
45 DCOE
Garrett turbo
Tim's stage II turbo heads
MSD Box and distributor
Car Craft turbo header |
|
| Back to top |
|
 |
slayer61 Samba Member

Joined: June 01, 2021 Posts: 1398 Location: TX
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Posted: Mon Dec 29, 2025 2:14 pm Post subject: Re: slayer61 finally has a Dune buggy! |
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It runs! Huzzah! No issues this time, no oil leaks, nothing. It fired up, but no real testing today, it's 30 degrees out and too cold for a buggy ride I kinda like the sound of the new exhaust too. I might end up keeping it.
Happy new year my friends _________________
| Cusser wrote: |
... Most folks are idiots when it deals with electrical !!! |
| 67rustavenger wrote: |
3/4 race cam? What's missing, one of the lobes?  |
Paul
'68 Manx clone... Sears??
RLR/Strange brakes
2276 built on AS21 case
W-125 w/ GB 1.25:1 rockers
Mahle forged pistons
CB 4340 crank
CB H beam rods
deep sump
45 DCOE
Garrett turbo
Tim's stage II turbo heads
MSD Box and distributor
Car Craft turbo header |
|
| Back to top |
|
 |
stevemariott Samba Member

Joined: November 09, 2003 Posts: 1124 Location: Portland, OR
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slayer61 Samba Member

Joined: June 01, 2021 Posts: 1398 Location: TX
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Posted: Wed Dec 31, 2025 2:30 pm Post subject: Re: slayer61 finally has a Dune buggy! |
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Yup. That's exactly the one I got. It doesn't reach the height of the table. That's where my wife came in. And it doesn't go low enough for the buggy, so I ended up jacking up the buggy to suit the cart. Win, win baby! _________________
| Cusser wrote: |
... Most folks are idiots when it deals with electrical !!! |
| 67rustavenger wrote: |
3/4 race cam? What's missing, one of the lobes?  |
Paul
'68 Manx clone... Sears??
RLR/Strange brakes
2276 built on AS21 case
W-125 w/ GB 1.25:1 rockers
Mahle forged pistons
CB 4340 crank
CB H beam rods
deep sump
45 DCOE
Garrett turbo
Tim's stage II turbo heads
MSD Box and distributor
Car Craft turbo header |
|
| Back to top |
|
 |
slayer61 Samba Member

Joined: June 01, 2021 Posts: 1398 Location: TX
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Posted: Thu Jan 01, 2026 2:41 pm Post subject: Re: slayer61 finally has a Dune buggy! |
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Happy New Year everyone!
It was warm enough today to do some low speed jet testing around the neighborhood I figured as long as I kept it to a "reasonable" speed, the neighbors would continue to wave, and not shake their fists.
I believe i have the idle jet portion sorted out for now. At a 2krpm cruise, I get an AFR of about 13. Anxious to feel the new turbo stretch it's legs, I stepped into it a little bit and 3 pounds of boost at partial throttle!
Looking forward to main jet testing
Be well everyone _________________
| Cusser wrote: |
... Most folks are idiots when it deals with electrical !!! |
| 67rustavenger wrote: |
3/4 race cam? What's missing, one of the lobes?  |
Paul
'68 Manx clone... Sears??
RLR/Strange brakes
2276 built on AS21 case
W-125 w/ GB 1.25:1 rockers
Mahle forged pistons
CB 4340 crank
CB H beam rods
deep sump
45 DCOE
Garrett turbo
Tim's stage II turbo heads
MSD Box and distributor
Car Craft turbo header |
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| Back to top |
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 |
EVfun  Samba Member

Joined: April 01, 2012 Posts: 6407 Location: Seattle
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Posted: Thu Jan 01, 2026 3:26 pm Post subject: Re: slayer61 finally has a Dune buggy! |
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| slayer61 wrote: |
| Yup. That's exactly the one I got. It doesn't reach the height of the table. That's where my wife came in. And it doesn't go low enough for the buggy, so I ended up jacking up the buggy to suit the cart. Win, win baby! |
They sure make it easy to install or remove an engine. To install I jack the back of the buggy just enough put jack stands under the rear torsion housing. Then with an old scissor jack I raise the front end of the buggy enough that the engine is a strait shot onto transaxle. The engine sits nice and secure on the lift, no balancing required. _________________
| Wildthings wrote: |
| As a general rule, cheap parts are the most expensive parts you can buy. |
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slayer61 Samba Member

Joined: June 01, 2021 Posts: 1398 Location: TX
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Posted: Sat Jan 03, 2026 4:19 pm Post subject: Re: slayer61 finally has a Dune buggy! |
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 _________________
| Cusser wrote: |
... Most folks are idiots when it deals with electrical !!! |
| 67rustavenger wrote: |
3/4 race cam? What's missing, one of the lobes?  |
Paul
'68 Manx clone... Sears??
RLR/Strange brakes
2276 built on AS21 case
W-125 w/ GB 1.25:1 rockers
Mahle forged pistons
CB 4340 crank
CB H beam rods
deep sump
45 DCOE
Garrett turbo
Tim's stage II turbo heads
MSD Box and distributor
Car Craft turbo header |
|
| Back to top |
|
 |
slayer61 Samba Member

Joined: June 01, 2021 Posts: 1398 Location: TX
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Posted: Mon Jan 12, 2026 10:28 am Post subject: Re: slayer61 finally has a Dune buggy! |
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Thanks to the samba and the members, I've received a lot of suggestions and assistance towards getting this problem child to idle and not blow up again. It has been suggested that my cam is too big for the turbo, that the rockers have too much lift. So a $10 purchase from the samba classifieds for a set of stock 1.1:1 rockers seems like a cheap test. Hell, it's cheaper than another couple of dcoe jets. We'll find out soon enough...
Stay tuned! _________________
| Cusser wrote: |
... Most folks are idiots when it deals with electrical !!! |
| 67rustavenger wrote: |
3/4 race cam? What's missing, one of the lobes?  |
Paul
'68 Manx clone... Sears??
RLR/Strange brakes
2276 built on AS21 case
W-125 w/ GB 1.25:1 rockers
Mahle forged pistons
CB 4340 crank
CB H beam rods
deep sump
45 DCOE
Garrett turbo
Tim's stage II turbo heads
MSD Box and distributor
Car Craft turbo header |
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| Back to top |
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