Adam Mahan's Garage

@adam-mahan

-

FOLLOWING

17

FOLLOWERS

homepage tile photo for undefined

Sick of my questions yet? Im incredibly indecisive with what motor i want in my 79 trans-am. Anyone

[]Pat Hadley

One thing that is often misrepresented is the cost of LS swapping an older car. If you are willing you can buy an older work truck (98 and newer). Many times for under $1500, sometimes $1000.

After this you start selling off what you don't need.

Napa can make you any hoses you need. (A/C & PS)

Throw some new bearings and an oil pump in there, regap the rings and you have a ride that will cruise all day and easily move when you want to.

[]Pat Hadley

Also, on the torque front you can have big block style toque in them if you want.
My GTO has 435hp and 695ft-lbs @1800rpm also get 24mpg averaged over 400mi at 80mph (average) with the A/C on.

[]Wilson Oberholzer

Any reason why you wouldn't want to go with a standard Chevy small block 350? From what I've seen they are stupid cheap to buy and upgrade. The parts are ridiculously easy to get for them and if I remember correctly a lightly boosted small block can make 500hp easy.

[]Adam Mahan

I've got 2 350s and a 400 that needs serious rebuild. Actually they all do. My dads 350 screams like hell in his Z28. I was just never happy with my 350. I just like the power of the bigger engines and it might cost a lot more for a 383 or 454 but ive got even more room to grow when I decide to build it up again later down the road. Go big or go home right?

[]Wilson Oberholzer

There's nothing wrong at all with wanting a big block, I just wasn't sure what you reasons were. I'd love to have an old muscle car with at least 400ci and a roots style supercharger sitting on top of it someday. I know somebody else suggested an LS with EFI but I remember seeing a show where they took an LS and made it carbureted (I think it was "Project Blue Hair" on "HorsepowerTV") if the EFI setup isn't your thing. It would make building power relatively easy and the LS truck engines (with iron blocks) seem to go pretty cheap too.

[]Gregory Garoppolo

Have you considered going to an LS swap with a standalone computer system? That's probably where the biggest power is and it will save you some weight over something like a 454 or a 383 in there. An LS4 with a supercharger will make like 720 HP and get better fuel economy. Of course you can have your cake and eat it too and get the LSX 454, maybe that's what you meant in the first place? Or were you thinking old iron block 454?

[]Adam Mahan

Nah im thinking one of the old boys. I found a nice 454 for a decent price. The new ones are far beyond my price range sadly. Eventually id toss alumimum heads, forge the internals and toss a supercharger on it and all that on it but that's down the road. Honestly i dont really need the power of the 454 but I figure why not. Fuel econony isnt really a problem because my daily gets good mileage.

[]Gregory Garoppolo

There's certainly a lot of upsides to building an old GM V8, particularly when money is a concern, which it always is for myself. Another engine that I like that gets less attention is the old aluminum small block Buick V8s, which were rather advanced for the time but of a much smaller displacement. I'm going to guess you want many many torques though, because why else does anyone ever want a big block? Torque is an addictive thing.

[]Adam Mahan

Thats kinda it. Im just not content with the 350 I have now and 500hp in a small block isnt the same as 500hp in a big block in my opinion

[]Gregory Garoppolo

Agreed.

homepage tile photo for undefined

Anyone ever gotten an engine from Summit Racing? Looking at a nice 383

[]Jake Johnson

Have seen a lot of builds that use Summit shortblocks, longblocks, or crate motors, and have heard nothing but good things. Summit and Blueprint Engines are the only companies I'd consider buying a crate motor from

[]Adam Mahan

Awesome I think I might take that route this time instead of rebuilding the 400 I have

[]Hayden Baker

I haven't but I know those 383s are a great deal compared to trying to build one from a junkyard block. I've had nothing but excellent experiences with summit racing. Definitely one of the better companies out there

[]Adam Mahan

Thats awesome news because I just picked up a 400 out of an old mud truck but its going to cost me an arm and a leg to get it ready for my car vs spending $4,000 for an already built 383 blueprint engine.

[]Hayden Baker

Yeah its fun to build a motor feom scratch but sometimes it's just better to buy a reman

[]Adam Mahan

Yeah I'll just save the 400 for another project I think. I want to toss a supercharger on it

[]Hayden Baker

Yeah a 6-71 would be cool

homepage tile photo for undefined

Summer wishlist. Whats a good 4 speed manual for a Chevy 400?

homepage tile photo for undefined

Gonna go and look at a an old Chevy 400 this weekend that i can get for dirt for cheap. Dont know a

[]Joost Van Dien

I say check all the tollerances first and go from there. Torque destroys everything if not build properly. Better to build a very strong endinge with good tollerances which you can bully than something that will explode.

Even on stock block you can turbo it but you will have to file open the ring gabs so it doesn't lock up when on boost.

Na can also be very nice but you will need to use a bigger cam and good heads to make good power. Nothing else than a big air pump. More air is more power. Opt for EFI for the best results.

[]Adam Mahan

I was looking into doing a transmission swap for hopefully a four speed manual. You got any ideas of a good one? Its either that or a 400 turbo trans.

[]Adam Mahan

My plan is to make it as close to bulletproof as I can get it. Forge everything and make the bottom end strong. I've seen people run around 6lbs of boost on a stock block and sometimes a little more but my only concern is if I'm going to boost it I'm going to boost if right. Id rather build it to last rather than take a chance of something blowing up. As far as cams go I want a big can for that deep blub blub roar with maybe a 700cfm carb? With aluminum heads. I've got an awesome pair of GTO heads but never can find a Pontiac to use them with lol. Ill look into EFI and see what I can find

[]Joost Van Dien

Bullef proof starts with an A, ARP. This secures all the critical components so they keep the correct shape. If you really go for boost, most important thing is open up the piston rings. They will simply lock if too much heat is going in. Using ethanol and or higher octane fuels reduces these risks but just open them up moren.

Head, carb and cam is something you need to match. Slamming a random set of parts togheter can give horrible results. Boosting will allow you to use a far less aggresive cam. Good luck!

[]Jake Johnson

Best cylinder heads that you can afford. That'll get you the most bang for buck. A really good head with a mild cam can do a lot more than a really mild head with a super aggressive cam

[]Adam Mahan

Hey awesome thanks for the feedback man. I have long term plans for the engine i just want it done and ready for some car shows this year. Im def going to take your advice tho and see what i cant find online tonight. Ive got the itch to start building really bad right now.

[]Jake Johnson

Understandable lol. Best advice I can give is make a plan and stick to it. Decide how much power you want, how much torque, and where you want each to be in the rev range. Also, pick your cam to match your heads, don't base your choice of head on a particular cam you want to run. Figure out which heads you like for your application the most, then pick a cam that will properly take advantage of the heads

[]Adam Mahan

See I don't know how exactly to figure out the rev range range so I'll have to figure out the rev range but I know a couple mechanics I can talk to about it. I know long term I want to get a supercharger for it. Not a roots but a twin screw. They seem to work really well and I need to get forged pretty much everything just in case ya know? Even tho I probably won't run to much boost. I know for sure I want to get aluminum heads. I picked up a set of heads for a 69 GTO awhile back but it's hard to find a Pontiac. Everyone has Chevy now. Maybe I can sell them for some extra funds. I want to push for 400hp for a good start then work up as I go. See I'm trying to compete with my dads 400hp Camaro because he destroys my current 350.

[]Jake Johnson

Only thing about forged pistons; sometimes, when the engine is cold, you may hear some piston slap on startup. Forged pistons expand more than cast or hypereutectic, so the bores need a little more clearance than if the motor was being built without them. Yes they can take more power, but don't be concerned if you hear some of that

homepage tile photo for undefined

If you could engine swap any motor into your current build or future build what would it be?

[]Dan Messerschmidt

Supercharged aluminum LS 6

[]Adam Mahan

Man would that be amazing. If I could find any ls engine for a decent price I would jump on it. They are just so expensive

[]Dan Messerschmidt

Yeah I know what car would you put it in though Adam

[]Adam Mahan

Oh jeez sorry lol. To be simple I'd just put it in my trans am where it it deserves to be