The look of an 871 with duals on my skate board would be cool 😎

Yeah I agree, needs an intercooler for sure.

The carbs help cool the air charge

its a lot

Dito

I would too but only if they tested it against the latest twin screw like the Gen 5 Whipple due to its massive increase in efficiency similar to the new TVS 2650 design. Not as interested in what a 15+ year old Kenne Bell 2.1L or Gen 2 Whipple does.. Since Richard typically uses used parts maybe use a Hellcat twin screw.

I agree, throwing a modern twin screw to the mix would be interesting. Obviously it’s the preferred tech for OEMs (Hellcat, etc.) these days, so let’s see how efficient it really is, and if it matches the Roots instant boost.

@@richardholdener1727 factor in the higher boost of the 8-71 along with the parasitic loss it faced up top. Thus the reason for screw type and others. Think high compression engine, high torque starter.

Stroker kit for your 6.0...

@@sean5comet $$$$$$

Was going to state the 8-71 is going to have more parasitic losses than the Vortech (meaning the same thing, just said differently). The higher you spin the 8-71, the greater the losses.

93 cougar 302 here. Nobody could tell--sleeper wars.. It would be a little bit tacky though. Maybe if I painted it yellow and put a Cougar emblem on it......

I spent a lot of time in an MGB back in high school with my Buddy Bobby

@@richardholdener1727 imagine how much fun that MGB would of been with better suspension, better brakes, better tires, a full chassis and a healthy SBC---BIG FUN (it's funny how many people had experience with MGBs back in the day)(I've never ridden in a stock one)

Had a boss with an MG back in the 70’s. Car spent half its life in repair shops. Because it’s BRITISH!!

@@danmyers9372 --------my MGB has NO MG under it's body--basically I fixed it

The main difference is that the centrifugals feel like they keep pulling harder as RPM rises, while PD blowers will fall off sooner and you can feel that. No better, no worse, just different.

@Mod Zozer You're going to have a difficult time beating a BBC anywhere on the curve with a SBC I believe - even if we reduce the bore size of the BB to eliminate that breathing advantage, BB heads(and intakes for that matter) are still intended from the start to flow more air than SB heads. You could conceivably do this pretty easily with a 396 BBC and a 400 SBC; the 396 has a 4.094 bore X 3.760 stroke(even better - the '70-'72 '396' was actually a 402 with a 4.124 bore) while the 400 has a 4.120 bore X 3.750 stroke, that's pretty damn close while being able to use cheap OEM/stock replacement components. Without putting the worst factory head on the BB and any nice race head on the SB, I don't see how you make up the head flow difference of the BB. And, if you're going to put such drastically different heads on them, then what are we really testing? This would be 100% dependent on the heads, full stop. With all else being [basically] equal, whatever you do with the head choices is going to determine the result. And, if you use heads intended for similar use for each engine, then the BB should come out on top 10/10. Space is a luxury for moving air, it allows for larger ports, larger valves/more valves, better valve placement, etc. Lets not overlook the fact that the BB has bigger heads for a reason - because it can support significantly more cubes. As such, it also weighs more than an SB of comparable displacement, which is of course the advantage of a large displacement SB. While it's an interesting experiment, I don't suspect it would make a difference to anyone's plans; if you're building a BBC to only 396 cubes, you're doing it wrong!

Best of both worlds

Blow the Vortec through an intercooler into the Roots. Probably would need lower compression (7.5:1) if the boost is much higher. Actually, this test shows how much power it takes to spin the Roots unit compared to the Vortec.

@@motorosso3349 roots shovels the air in, centrifugal pumps it in. There are better & worse designes over the years for efficiency. banks talked about some real bad ones that made boost but basically gave no hp improvement over na they made so much heat chopping the air.

@@motorosso3349 some of it is parasitic loss id say more is heat loss

Watch gale banks duramax vidys

The Monster Truck engine series... kzfaq.info/sun/PLwtmrqcWzLtRXpEFXeXa3YF-L0xSK2Ml2 ...he tested a roots, a screw, a turbo, and the turbo being blown into the screw and I believe the roots as well. Note that they did cook the roots because it was a tight roots intended for fuel draw through to help control temperature, and they were running it dry of course. Still useful data though. The notable episode IMO though is the methanol injection test - Banks shows evidence that meth injection can create detonation, impressive test, and a bit of a reality check on just dumping different fuels into our engines.

114 overlap and 500ci

The roots will be cooler because of the charge cooling from the carbs.

the vortech is a blow through so also charge cooling

@@richardholdener1727 my point was that you can't really compare the boost temps because the roots is being cooled from the start.

@@bartpang It doesn't matter at what point the cooling of the compressed air charge occurs, it's still getting cooled either way. You can run draw through on a centrifugal - won't make a difference whether the carb is in front of or behind the blower. Hell, roots blowers have been blown through carbs before, back before mounting them in the 'vee' became the norm.

@@RyTrapp0 How do you measure it? That was his question. My point was you can't get a real comparable measurement.

Centrifugal or turbo for sure. No need to pump that much air with the roots

The LS will make more power, the heads are that good

All depends.... Airflow doesn't always dictate more hp. But I agree the ls heads are a better starting point than the traditional 23 degree heads.

He never said to use factory parts(what would be the point again?) - aftermarket big block heads are still king, and they'll own every area of the curve. There's nothing 'special' about LSx heads, they're just newer/more modern than the 1960s-early 1990s junk; a similarly modern SBC head can keep up, and a similarly modern BBC head will continue pulling a lead.

I doubt the sb head will keep up but a hybrid with ls heads might run away with it? It would be interesting for sure

@@RyTrapp0 agree, 15 degree aftermarket head vs stock ls would most likely do better. But a good set of 23 degree heads that flow 330 - 340, with enough area in the head can still produce 700+ on a sbc. For example AFR 245. Which is still on the verge of being maxed out on 3.875 - 4.00 stroke at 7000rpm

@64NovaSS TT Nope.

BTW, now I understand why you went through Fresno...

that idea has been around a while but by using a huge throttle body in the intake side of the supercharger. since as you block off the air intake it doesn't take as much power to spin the blower compared to venting the air after being compressed. but I don't know if it's been done in real life since once you get it on the car, if you want to make less power you can just short shift it. but be cool to see on a dyno.

yes-the Realtime Acura NSX employed that in World Challenge

@@richardholdener1727 I wondered why that car was so fast!

that centi blower will outrun the roots. it looks really cool and does make power but its old tech. the YSI wasnt even being pushed on pump gas. that box is what it makes it not need an intercooler with a carb. 1200+HP vs doing that with the 8-71 without race gas? good luck...just get a 8.2 whipple if you want the look

oh boy. Some inaccuracies in your statement there. Integra is a product of the Acura division of Honda, so it's not a Honda Integra. Also 496 blower? So are you trying to say he put an 8-71 on a 4 cylinder? Or are you trying to say he put a blown big block Chevy in an Integra? You can pick one, but I will give you a hint, they are both lies.

@@paulchilders9969 kzfaq.info/get/bejne/sLyCo8Z_p9qvnmQ.html

@@jonathanwhitehead4763 Thank you for providing evidence of why you don't want to do this.

@@paulchilders9969 We get it - you ran your mouth about stuff you don't know about. It happens, you'll get over it.

@@RyTrapp0 No I didn't. I just didn't think anyone would be so stupid as to actually ruin a car by doing that. 1. It won't make a pass at the drag strip, at least not one that couldn't be beat by any decent turbo 4 cyl. 2. It is now totally insufferable as a street car. It's nothing more than a novelty.

at least

@@richardholdener1727 would 10:1.1 be ok on E85 this is what I'm building now 👍

on e85 yes