turbocharging, whats needed?
- Thread starter stanggt
- Start date
Fryguy302
Club Member
I went 155mph @ 3200# with that turbo. 21psi and 347cid. That was only 6200rpm also.
That's a lot more than 700hp
I didn't log backpressure, but it might have been high? That was with a 1.15 hot side. It did spool very fast.
I went 155mph @ 3200# with that turbo. 21psi and 347cid. That was only 6200rpm also.
That's a lot more than 700hp
I didn't log backpressure, but it might have been high? That was with a 1.15 hot side. It did spool very fast.
155mph. Thats like 700 whp give or take vehicle. I always think RWHP Raj.They offer anything bigger then 1.15 on the 4276 family now ? I can hardly keep up with all the new parts in the last year or 2.
Fryguy302
Club Member
I dunno, every calculator I've seen shows that as over 900hp? I don't know if they have bigger hot sides now, but to be honest that combination was very trouble free, so it really doesn't matter what the back pressure was. No blown head or header gaskets with that combo. I really liked that turbo, that's why I recommended it on here....that was 2005, maybe there are better ones out now, like that bullseye stuff you guys were using. I just know that turbo and a cheap ass Windsor would make 700hp all day long.
Sounds about right for flywheel HP. I just think RWHP becuase thats the metric I live in.
Either way. Sounds like a rockin combo to me.
I think a s400 would be more budget and make a bit more power thanx to the available hotside choices in both t4 and t6 configurations. At the end of the day though. They would both make about the same amount of power with a 75-76mm compressor.
stanggt
Forum Member
holy smokes, been away for a couple days and come back to all this great input. I love drag racing and watching the mustangs run 9's and low 10's and I think its awesome the way a turbo car comes on and decided to start a build for a turbo set up. As for probly alot of people money is tight right now but things are looking better as the year progresses. Was hoping on building from a good pre 1974 351 block and using your input for the build. Alot of you guys have some great experience and who is better to learn from than someone who has done it. Like I stated, I want a dependable set up but would like the hp when my foot feels heavy. How much power is practicle out of a stock block? With the right suspension set up and tune I would like to see low 10's high 9's out of my 3000lbs vert. What kind of power would propel me to that kind of time assuming that my set up was right? Thanks guys this is awesome. Im taking notes in my notebook.:1syellow1
Fryguy302
Club Member
Honestly, even the weakest of all 351w blocks will be reliable at that power level. If the car is really only 3000# going down the track, you'd only need roughly 600hp to do that. I suggest making 700hp instead, you can always turn the boost down if you want. This link can give you a rough estimate of the power you need to make:
http://www.detroitracing.net/calculators.html
A 69-74 block (and even crank) will support that, but if you have the budget to get better stuff, go for it. You'll want to go faster later almost for sure. I think a low RPM cheap windsor with a GT42-76 will do that trick.
I love building budget stock based motors. It is challenging to make work right and live. If your looking for low 10's high 9's a low rpm stock windsor 351 block setup will get the job done. If you think in the foreseeable future you may want to step it up "with turbo cars this is usually pretty easy and addictive" you might want to consider upping the investment in the lower end.
I'd squeeze the budget on the heads and put that money in the block. Its not the normal way Na engine builder think but its where the most stress will occur.
Also if you shop around you might be able to buy a good used Dart or Ford racing block. Hell you might be able to buy a nice short for what you'll send on maching and parts to build a new motor and get away with freshening on a used short or long block. If you buy a used motor though. Make sure its torn down unless you can see it run. Even then. A tear down is always a good idea. but with alot of guys stepping up from turbo SBF's to BBC etc. It is a good time to be a buyer.
stanggt
Forum Member
thanks Fryguy and Sean you have been very helpfull with your wisdom and am looking forward to doing this build. As I start this I will use this forum in the projects section and use sponsors and people in this forum to but my parts. This forum is awesome, wish I was a bit closer to the burbs so I could hang with sum of ya'll at the tracks you go to. I'll keep ya posted. Thanks again:handshake:
igotaneed4speed
Club Member
As already mentioned go to Theturboforums.com
There is a fricken ton of info on there just use the search feature and read stuff.
Guys make that kinda power on stock short block 351w's with pump fuel
There is a fricken ton of info on there just use the search feature and read stuff.
Guys make that kinda power on stock short block 351w's with pump fuel
Anthony
Club Member
if i could sell my stuff at a reasonable loss....... i would be Dom@ livernois/ dpmcghee Jr.:hugegrin:
LTLHOMER
Club Sponsor
My blue car would go 155 at 3400 lbs with ~850 to the tire so I think you're estimate is close.
I think it went 140 flat with 600 to the tire.
P.F.M.
Club Member
X2 Raj and Anthony... I did this for two years with a 347 and a Mexico block. Plus you will want to go faster.
Rickety
Club Member
dpmcghee
Club Member
You can't find a cheaper more powerful turbo than the BorgWarner S400. In bare bones trim that 75mm compressor wheel will make 700rwhp all day long on a 351W sized engine.
Raj's suggestion of a GT42-76 is good, too. But if you're trying to save money the Borg is the way to go, IMO. Plus, the upgrades now available in that S400 platform are pretty impressive. I think you can get several larger compressor wheels in that chassis - 80mm, 83mm, 88mm, 91mm? and I think some larger than this. It gives you alot of room to grow.
Raj's suggestion of a GT42-76 is good, too. But if you're trying to save money the Borg is the way to go, IMO. Plus, the upgrades now available in that S400 platform are pretty impressive. I think you can get several larger compressor wheels in that chassis - 80mm, 83mm, 88mm, 91mm? and I think some larger than this. It gives you alot of room to grow.
At the moment they are still at 83mm. but bigger wheels are in the pipe for the s400 chassis. The s500 chassis stuff can go pretty stupid and covers the gammit from 83up.
Fryguy302
Club Member
A friend of mine who's on this board just got an 88mm version of the S400, but it might have been a custom piece, not sure.
dpmcghee
Club Member
Yeah, I think Jose at Forced Inductions is putting those together right now. But I thought Bullseye had something that size available too... Sean would know more than me about what's actually available now though.
GPowrie
Forum Member
The the 488 and 491 are not totaly S400 based units that I know of. What is his hotside housing and wheel? From Bullseye the biggest standard S400 based unit is an 83 but they do have a S488 and a S491, they don't use the S400 CHRA though. Basicly Bullseye's 88 and 91 will not bolt in place of their smaller units.
If that is a FI unit then most likely it is a 4788 or pt88 wheel in a BW cover and cartridge. but thats is just a wild assumption on my end. I think they do make a 88mm compressor wheel but I have no idea how it would all get put together.
Borg Warner has not cleared for production use the anything bigger then the 83mm wheel as far as I know.