#41  
Old 11-28-2021, 05:54 PM
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Folks in the fall of 1954 (yes, 1954, 55 Chevy's came out in fall of 1954) were poking around salvage yards looking for these "new" Chevrolet engines, in wrecked cars. Having heard the performance potential, and they were not disappointed. Same thing going on now. Nobody is putting any of the ford stuff or a hemi in their Hot Rods, yes one, here and there, but very few...
Think about how powerful a 455 inch LS engine would be......
Making a good running early small block Chevy was not difficult. Making a good running LS is easier, but all the gyrations you have to go through to convert an older vehicle, in not cheap!!!
I'll stick with the old stuff, no hate for the LS world here.

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  #42  
Old 11-28-2021, 05:56 PM
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Originally Posted by PAUL K View Post
Your opinion is becoming more popular. A lot of folks don't know how to tune a carburetor.
the problem i see with carbs these days is quality control on the lower end stuff. i tried a quick fuel slayer and 3310, both were not great. the black diamond SS 850 you sold me and the AED I sent you were both fantastic.

I also had good luck with a street avenger I bought new. I will say that Holley has fantastic customer service and on another quick fuel I had they rebuilt it completely at no cost to me.

If i needed a new carb (and I definitely don’t), I would feel great about going with a Holley or Quick Fuel again but I’d stay away from the cheaper stuff.

That black diamond SS 850 might be my single favorite car part ever. I can’t get over how great it runs and how well the finish has held up.

  #43  
Old 11-28-2021, 05:58 PM
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people that like LS swaps in old cars are like people that eat blue cheese. i don’t understand it, i definitely don’t trust them, but i can’t honestly say there’s anything wrong with it?

  #44  
Old 11-28-2021, 06:10 PM
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I’m just so sick of the anti-LS crowd. It’s 2021, guys. We need to get over the knuckle-dragging, antiquated ideas of the past and move on. I don’t care if it’s Caitlyn Jenner or a Ram Air IV Trans Am, if someone wants to do major surgery on their prized possession, remove the most important part and replace it with something that is never gonna look right, and expect everyone else to applaud their bravery - we need to do it.

You anti-LS guys sound like a bunch of bigoted jerks!
I have zero issues with LS engines..just don't like the LS swaps in classic Pontiacs.. Just my opinion a Pontiac to me is a classic Pontiac with a Pontiac engine.

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  #45  
Old 11-28-2021, 06:10 PM
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Greta Thunderburger loves the LS for its 'efficient' planet saving Active Fuel Management that conserves fuel by turning the V8 into a V4. It is really a shame how the system will eventually go bad and cause the engine to burn a quart of oil per 1,000 miles, blowing blue smoke all over the cars behind you. Make sure when you swap the LS in your Pontiac that you properly re-install this amazing technology.

  #46  
Old 11-28-2021, 06:11 PM
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Originally Posted by Tom Vaught View Post
Impressive for the weight.

Mr Bill Klausing had a 63 wagon 4300 lbs with a basic 462 engine and a decent 400 trans/converter that would run 12.06 20 times a day at the track
(if you kept putting gas in the thing.) 1963 rear axle, frame sectioned for a bit wider slick. He ran a Tri-Power intake with 3 Holley 2-BBLS, excellent Bracket Car and ran exceptional 60 times for what it was.

Just saying, with tuning a Pontiac engine and chassis can be deceptive.

Tom V.
I believe it, but looking at how big the engine is, cubic inch vs cubic inch, it's hard to argue the power the LS puts out for it's size.

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  #47  
Old 11-28-2021, 06:20 PM
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Originally Posted by i82much View Post
the problem i see with carbs these days is quality control on the lower end stuff. i tried a quick fuel slayer and 3310, both were not great. the black diamond SS 850 you sold me and the AED I sent you were both fantastic.

I also had good luck with a street avenger I bought new. I will say that Holley has fantastic customer service and on another quick fuel I had they rebuilt it completely at no cost to me.

If i needed a new carb (and I definitely don’t), I would feel great about going with a Holley or Quick Fuel again but I’d stay away from the cheaper stuff.

That black diamond SS 850 might be my single favorite car part ever. I can’t get over how great it runs and how well the finish has held up.
Good info. My first sales pitch when a customer wants to convert their muscle car to EFI is a Quick Fuel carb with an electric choke is going to be real close. A Q-jet will usually work better for most street applications, they just aren't commercially available.

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  #48  
Old 11-28-2021, 06:20 PM
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Originally Posted by pastry_chef View Post
Anyone looking for BBC, Mark Jones turns out tons of stellar builds.
https://www.youtube.com/watch?v=rIIoazbO0d0

BBC 467
10.6 compression
Isky 238/248 - 578/608 - 109/105 billet hyd roller
AFR 305 heads, performer RPM intake
950 Pro systems carb.
648.9 HP @ 6400 RPM 619 TQ @ 4500 RPM
That's similar to my 454 with minor differences. Same AFR 305 heads, Comp custom 242/248 hydraulic roller with .638 lift. My compression is only 10.2 and mine is only .030 over. I built this engine 20 years ago myself. Used heavy TRW slugs with large 5/64 ring package and standard tension oil, so I give up a little HP there too along with the smaller bore. RPM air gap out of the box with a 1" open spacer, and a 950HP also built by me, made 608 hp at 6300 and 589 tq at 4400. I've been happy with it.

That build even 20 years ago wasn't cheap. Heads alone were $3000 back then.

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  #49  
Old 11-28-2021, 06:28 PM
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I would say up to a point the real difference is money spent to get it done. I see no reason I couldnt build a 400 pontiac with mild compression KRE or Edelbrock D ports, EFI and make comparable go to a Mild LS engine. Up to 550-600 go the block is solid. The advantage the LS has is the design of the block.

  #50  
Old 11-28-2021, 06:28 PM
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N/A? Street cars I will run them heads up at TMP is they are up for race?
100% NA pump gas.
10s not only running in October mineshaft air. lol
I think some run 20 plus cubes less than you. 427 / 433 ish.

  #51  
Old 11-28-2021, 06:34 PM
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Originally Posted by Scott Stoneburg View Post
I see no reason I couldnt build a 400 pontiac with mild compression
Please do.. I want to see a 700 HP N/A pump gas traditional Pontiac .. about 410 cubes or so. Streetable. Where are they?

Up to 550-600 << NOT good enough!

  #52  
Old 11-28-2021, 06:36 PM
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Originally Posted by pastry_chef View Post
100% NA pump gas.
10s not only running in October mineshaft air. lol
I think some run 20 plus cubes less than you. 427 / 433 ish.
Cool, and they should with what is out there for parts. I'm open for the challenge..

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373 gears 3200 Continental Convertor
best et 10.679/127.5/1.533 60ft
308 gears best et 10.76/125.64/1.5471
  #53  
Old 11-28-2021, 06:36 PM
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As far as carbs vs EFI, Both of our dailys have carbs if that tells you anything.

As far as carbs go I either like original OEM holleys or a Qjet. Either are easy to tune. I like aftermarket Holleys, and I'm talking if you get into the good ones that cost nearly $1000. Usually if I need something like that I build my own starting with a good main body and go from there.

My only complaint is the drastic elevation changes we deal with in Arizona. I can watch the AFR change more than a full point and up to a point and a half in either direction within 20-30 miles of the house. Makes it a challenge to dial in a carb to work in all conditions and try to keep the engine safe at the same time.

For giggles dad and I decided to try Holley EFI on a couple of the cars that aren't driven too regularly. We do take them down to near sea level for racing but spend most of their time driving up above 5000 feet. You almost just need 2 carburators for that and swap the other on at the track.
For that reason we tried a couple of Snipers on both cars. Their ability to adjust on the fly was a game changer and just so much easier to deal with. Last weekend we drove them both to Phoenix and I loaded a different tune in to log when near sea level just to see the changes and compare. Gotta say it was nice to tweak on it and never had to open the hood. My 600hp 454 got 16.8 mpg with the new 4L80E behind it. I'm not complaining.
I still like carbs though.

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  #54  
Old 11-28-2021, 06:38 PM
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Originally Posted by PAUL K View Post
Good info. My first sales pitch when a customer wants to convert their muscle car to EFI is a Quick Fuel carb with an electric choke is going to be real close. A Q-jet will usually work better for most street applications, they just aren't commercially available.
the electric choke on my 850 works great. i did go with a manual choke on my old truck - 770 street avenger in a 72 K10 longbed. I plow my driveway with the truck and I think maybe the manual choke has an advantage if you wanna get going quickly on a really cold day.

My two cents - you get a guy that wants to plow his driveway with his GTO or Firebird, consider recommending a manual choke

  #55  
Old 11-28-2021, 06:40 PM
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Cool, and they should with what is out there for parts. I'm open for the challenge..
I suspect heads are custom ported... same as yours.
You haven't seen an N/A LS run deep 10s.. ??

  #56  
Old 11-28-2021, 06:41 PM
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Originally Posted by spectramitch View Post
Greta Thunderburger loves the LS for its 'efficient' planet saving Active Fuel Management that conserves fuel by turning the V8 into a V4. It is really a shame how the system will eventually go bad and cause the engine to burn a quart of oil per 1,000 miles, blowing blue smoke all over the cars behind you. Make sure when you swap the LS in your Pontiac that you properly re-install this amazing technology.

Sure, buddy.

This tech has been in GM trucks since 2014 - don't see many if any smoking.

  #57  
Old 11-28-2021, 06:47 PM
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Originally Posted by pastry_chef View Post
I suspect heads are custom ported... same as yours.
You haven't seen an N/A LS run deep 10s.. ??
Nothing mid to low 10's..most LS builds I see are turn key cruisers with a few faster builds..most aren't dialed in with the suspension..The faster guys are the turbo guys. To me that's the appeal of the LS platform..having cheap shortblocks available for that just in case.

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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2
373 gears 3200 Continental Convertor
best et 10.679/127.5/1.533 60ft
308 gears best et 10.76/125.64/1.5471
  #58  
Old 11-28-2021, 06:48 PM
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Quote:
Originally Posted by GTOGEORGE View Post
There’s a good thread on Facebook where Pontiac’s are making over 800 hp with a stick block and steel heads! SCREW A Chevy!
A lot of well known Pontiac guys are in on the conversation, Voycey, gaydosh, McCartney, etc!
I will recheck spelling of names…..sorry!

GTO George
Do you have a link?

  #59  
Old 11-28-2021, 06:49 PM
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Originally Posted by Scarebird View Post
Sure, buddy.

This tech has been in GM trucks since 2014 - don't see many if any smoking.
They only had that for a few years..I've ran the 6.0's for years and they never had that on my work vehicles..
Greta anyways is doing a LS swap into a Tesla...so much for saving the planet..

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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2
373 gears 3200 Continental Convertor
best et 10.679/127.5/1.533 60ft
308 gears best et 10.76/125.64/1.5471
  #60  
Old 11-28-2021, 06:50 PM
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Originally Posted by ta man View Post
I have zero issues with LS engines..just don't like the LS swaps in classic Pontiacs.. Just my opinion a Pontiac to me is a classic Pontiac with a Pontiac engine.
there may have been a smidge of sarcasm in that post ...

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