First 914 build... V8 twin turbo SBC, 1974 v8tt conversion project Options

[beam944]

Wow...you guys been busy...lol...jut getting in from my shop.been a long week and have a lot to finish before this weekend. Andyrew...I have decided I will make my own intake...carbon fiber...exhaust will be an 8-1 straight to a single t4 flange and so on...the motor in the pic above is my test one to put in the 914 while the 283 is being built...I hear you guys talking about Audi and Subaru tranny's...are they strong enough for 5-600hp 4-500tq?
I have also gone down the rabbit hole of a flat plane 180 degree crank...as I am a compcams dealer I thought it appropriate to ask myvrep about having a can made...well let's just say if you don't need 20 of them made at once it's like giraffe ass....way up there. $2500...Bryant crankshafts can do the crank...about $4500...so flat plane dream has taken off without me. But I did purchase a nice tig today and should have it by next week!

[Andyrew]

Carbon fiber intake, as in intake manifold? Ya... Dont do that. If you want to go crazy with fabrication go aluminum. If your panning on intake from the turbo to the intake then sure whatever floats your boat. I prefer steel/aluminum/rubber.


Subaru/Audi tranis can handle some serious HP, but torque is the killer which is why you need to do what you can to keep displacement small and keep the HP way up top.

If you can build that 283 to rev to 9k do it. There are plenty of 6-700WHP drag subaru's and audi's. I know specifically of a very fast 650whp Audi that runs a $200 transmission. I believe he's on his 5th transmission (4th gear is weak) but he does ~ 30 drag passes a year for the past 12 years...

[messix]

look for a L99 4.3 v8 from a min '90 caprice, looks just like a lt1.

grab the crank and rods [rods are longer than 350 engine and will put the small end in the right spot for the 350 pistons] out of that and use a 4" bore block with standard 350 pistons. the cranks are nodular iron and the rods are powdered metal, plenty strong to make 500/500 and light enough with a good balance to spin 7k rpm easy.

you now have a 302 ci sbc

short stroke large bore to use good flowing heads and will still look period correct.

[beam944]

Thanks for the advice...the plenum of the intake is what I'm speaking of...not the actual manifold...thinking of a stealth ram or something similar and making my own plenum that actually turns a bit since the headers will be coming up and over where the distributor should be...I will be going coil packs so distributor will not be an issue. I plan a lot before I start a project...plan,dream...and what falls into place and comes to fruition maybe different than the inception of an idea but that's what keeps me going and drives me to be different. I love the sound of Italian supercars and the style and design that goes into them...it is like art and for me, I just go in the moment when it happens and if can group all my ideas into a build ... Awesome. I haven't been this excited about a project in quite some time, if you knew my friends they would tell you...He is a dreamer that lives in his dreams everyday...positive is his M.O. ...and he has a horseshoe up his ass. (IMG:style_emoticons/default/smile.gif)

[beam944]

look for a L99 4.3 v8 from a min '90 caprice, looks just like a lt1.

grab the crank and rods [rods are longer than 350 engine and will put the small end in the right spot for the 350 pistons] out of that and use a 4" bore block with standard 350 pistons. the cranks are nodular iron and the rods are powdered metal, plenty strong to make 500/500 and light enough with a good balance to spin 7k rpm easy.

you now have a 302 ci sbc

short stroke large bore to use good flowing heads and will still look period correct.

Nice... But I already have my foundation...283 punched out to a 301 ...is essentially a dz 302... Guys have been spinning them to 9000 for a long time and hold up well...but get this ... Do you know you can build a 283 with a 2.6 " stroke... Jessel will be in the top end ...all forged internals.. Rods ...well carillo of course..lol

[messix]

look for a L99 4.3 v8 from a min '90 caprice, looks just like a lt1.

grab the crank and rods [rods are longer than 350 engine and will put the small end in the right spot for the 350 pistons] out of that and use a 4" bore block with standard 350 pistons. the cranks are nodular iron and the rods are powdered metal, plenty strong to make 500/500 and light enough with a good balance to spin 7k rpm easy.

you now have a 302 ci sbc

short stroke large bore to use good flowing heads and will still look period correct.

Nice... But I already have my foundation...283 punched out to a 301 ...is essentially a dz 302... Guys have been spinning them to 9000 for a long time and hold up well...but get this ... Do you know you can build a 283 with a 2.6 " stroke... Jessel will be in the top end ...all forged internals.. Rods ...well carillo of course..lol

no it's not..... you would be using the small journal crank not quite as strong even though it a steel crank.

but you're down in nascar land where unusual parts and pieces are common so must have a 283 cut for a large crank. I'm not sure what the does to the block webs in strength.

2.6 crank ? wow that's gonna take a fancy cam spec to get it to breath on a 4" bore and available heads. even under boost.

just thinking here.... very short stroke, gonna need a long rod, don't want a long piston skirt to heavy, might go with a small rod journal to lighten the rods up, excellent rod to stroke ratio could get away with very short piston skirt.

8.5k to 9.5k rpm if the valve train can get light enough, nascar sbc canted vavle engines don't have much in common with street engines any more, spendy valves and springs...


you must not be married or have kids!

[beam944]

I am married and have three kids (IMG:style_emoticons/default/smile.gif)

[beam944]

(IMG:http://www.914world.com/bbs2/uploads_offsite/i328.photobucket.com-17254-1398924228.1.jpeg)

[beam944]

(IMG:http://www.914world.com/bbs2/uploads_offsite/i328.photobucket.com-17254-1398924456.1.jpeg)
My wife will kill me for posting these...

[beam944]

Goodnight all...got to get up in 4 and a half hours...lol

[beam944]

From Crower..

(IMG:http://www.914world.com/bbs2/uploads_offsite/i328.photobucket.com-17254-1398955143.1.jpg)

[beam944]

messix....you are spot on

[messix]

9k-10krpm out of a 283 is what the drag guys were getting..... I wouldn't bet on expecting one to last long for any repeated and extended time.

I'm on board with the small displacement and stroke engine for a v8 conversion, I've been working on getting parts and pieces to do a ls1 block with 4.8 crank.

I have a pretty good chunk of my paycheck going to my ex for child support so using stock parts and finding deals is just the waiting game. the ls1 blocks are over valued so I might end up going with a 5.3 alloy block. those are hard to find but much less $$.

the allure of a all aluminum ls motor that could make 400-500 hp N/A pretty easily is just too hard to resist.

[beam944]

I completely understand... And yes guys were dragging them...but also short track guys up north were building them and running power glides and only first gear! Most ppl don't know a power glide can handle 14000

[Evil914]

9k-10krpm out of a 283 is what the drag guys were getting..... I wouldn't bet on expecting one to last long for any repeated and extended time.

I'm on board with the small displacement and stroke engine for a v8 conversion, I've been working on getting parts and pieces to do a ls1 block with 4.8 crank.

I have a pretty good chunk of my paycheck going to my ex for child support so using stock parts and finding deals is just the waiting game. the ls1 blocks are over valued so I might end up going with a 5.3 alloy block. those are hard to find but much less $$.

the allure of a all aluminum ls motor that could make 400-500 hp N/A pretty easily is just too hard to resist.

Seems like I saw a brand new either 4.3 or 5.3 block on ebay a month back for something like 2 or 3 hundred,seemed like a steal to me.I don't know much about that series of motors though.I've got a dz302 with Comp cams roller solid lifter and roller rockers that hits 7500 rpm easy.It has destroyed two 901 trannys but that was from pilot error (read like trying to stay next to Viper in 0 to 100 sprint). Big sticky tires don't help matters either,the 901 doesn't accept any abuse.Thinking about a Cayman S six speed. (IMG:style_emoticons/default/confused24.gif)

[beam944]

I am definitely looking at all options... I will look into that as well..ty

[andys]

9k-10krpm out of a 283 is what the drag guys were getting..... I wouldn't bet on expecting one to last long for any repeated and extended time.

I'm on board with the small displacement and stroke engine for a v8 conversion, I've been working on getting parts and pieces to do a ls1 block with 4.8 crank.

I have a pretty good chunk of my paycheck going to my ex for child support so using stock parts and finding deals is just the waiting game. the ls1 blocks are over valued so I might end up going with a 5.3 alloy block. those are hard to find but much less $$.

the allure of a all aluminum ls motor that could make 400-500 hp N/A pretty easily is just too hard to resist.

I had a similar plan until a complete low mileage LS1 came across my path (Z28 pull-out). LS1 with a 4.8L crank/rods works out to 312 cu. in, if memory serves me correctly. I do recall the Renegade Hybrids built such a motor.

With all that RPM you are considering, the money will be spent on the valve train. If you're in a pinch for $$, perhaps you should consider a stock 4.8L LSx. Plenty of them in the truck salvage yards for cheap, and the weight penalty is only 63lbs vs. the alloy block.

Andys

[beam944]

9k-10krpm out of a 283 is what the drag guys were getting..... I wouldn't bet on expecting one to last long for any repeated and extended time.

I'm on board with the small displacement and stroke engine for a v8 conversion, I've been working on getting parts and pieces to do a ls1 block with 4.8 crank.

I have a pretty good chunk of my paycheck going to my ex for child support so using stock parts and finding deals is just the waiting game. the ls1 blocks are over valued so I might end up going with a 5.3 alloy block. those are hard to find but much less $$.

the allure of a all aluminum ls motor that could make 400-500 hp N/A pretty easily is just too hard to resist.

I had a similar plan until a complete low mileage LS1 came across my path (Z28 pull-out). LS1 with a 4.8L crank/rods works out to 312 cu. in, if memory serves me correctly. I do recall the Renegade Hybrids built such a motor.

With all that RPM you are considering, the money will be spent on the valve train. If you're in a pinch for $$, perhaps you should consider a stock 4.8L LSx. Plenty of them in the truck salvage yards for cheap, and the weight penalty is only 63lbs vs. the alloy block.

Andys

The wife has ok'd me to build!! I have to start before she changes her mind...lol

[bulitt]

In that case there is a 700hp Nascar truck engine on WSalem craigslist! Cost the guy 46,000$ but for you today 12,600$ (IMG:style_emoticons/default/lol-2.gif)

[beam944]

In that case there is a 700hp Nascar truck engine on WSalem craigslist! Cost the guy 46,000$ but for you today 12,600$ (IMG:style_emoticons/default/lol-2.gif)

Tired of the same ole same ole... heard enough nascar engines to not want one... I want to be different. I like the challenge of the unknown... and think the sound will set it apart from all the others. May just go Kurplunk Boom... but I think positive and think it will be awesome