TBS 8-71 new owner,tech needed.

[blownzoom440]

i hope you dont mind me stopping in.i needed to go to a source with experiance.i am not a rookie with boost.i just got a new TBS 8-71 with teflon for better performance than the old 1 without strips from another company.i have been running 8lbs in my car for 2 yrs.what i am interested in is.the heat generated by the teflon with 8 to 14lbs or = to 5% underdriven to 5% overdriven running on gas[110sunoco]i have been able to go with 34 degrees timing with that fuel,8.8cr static,95cc openchamber iron heads.
THANKS!

[Big Boys Toy PE857]

Not exactly sure what your question is, but I will tell my exp. A friend of mine and I both have new Blower Shop Billet 14-71 teflon stripped blowers. I run my on alky, drag only, so heat isn't a problem. But my friend runs on gas. We took his motor to the dyno and the heat problem was off the chart. I believe it would have boiled water. The boost and power would drop off dramatically when hot. So after that session we took the motor home and added a Blower Shop inner-cooler, went back to the dyno and had lots better results.

[blownzoom440]

first off thanks for the reply!!
iyes i am interested in the blower air temp.i drag race so i am not sure of the long term effects but for 3 minutes at a time i will be running.i di have a water/meth injection kit on the way from snow flowing 1200ml/min to mainly help reduce the fuel octane requirements or maintane them at the 110 octane level.

[blownzoom440]

http://i27.photobucket.com/albums/c192/blownzoom440/Feb2335.jpg
http://i27.photobucket.com/albums/c192/blownzoom440/Feb2335.jpg
a little motor info to go with the Ques.
i put this cam in to makeup for a week blower putting out 10psi at 14% overdriven. :mad: the cam is .541int/.559exh,dur at .050 252int/260,113 lobe seperation.
heads flow 270cfm at .500int/180exh,2.14"int/1.81exh valve.
open chamber pollished/o-ringed 95cc's,.040 copper gasket.
wiseco 8.8cr blower pistons .060 in the hole.,030 4.35 bore,hellfire rings spdpro.
eagle h beam rods,floating pins,.990" w/arp 2000 bolt upgrade.
forged crank,arp 190,000 main studs.iron caps.
2 holley 850cfm carbs no power valves,no filters w scoop.
34 degrees timing in by 2500rpm/16degrees at 1000rpm.
the blower was not efficient and started superheating the mix and slowed me down in ET.10.46/129mph 4000lb car,about 680hp crank.

[blownzoom440]

i would think someome has a blower setup for running gas/teflon in a 8-71.i have been talking to the blower shop and getting info on clearances to the case/teflon but some real world setups would help.
anyone!?

[T-Bag'n]

I used to run a blown gas set up with a 12/71 stripped blower with a chiller in a boat race app. I had a second 3gall tank with with a closed water sys for the chiller and worked very well for us. I plumbed -12 in and out with a meizire 20gph in line electric pump. When called to the line we would pour Ice about 1/2 and fill with water jugs kept in the ice chest. The tank was aluminum and would "sweat" up like a cold beer and at the end of a 1/4 mile the water would be warm and that was with maybe 90 sec run time.

[T-Bag'n]

The motor was a 523" we ran the blower @26% over and made 16-20psi. I don't know air temps...

[blownzoom440]

having a chiller would be nice but the cost for me is a bit much.i am going to have to run it.and see what temps and fuel i will need to run.i will start with 110 sunoco with 8 to 12 lbs of boost.thanks for the info!!

[Infomaniac]

Just dyno'd a brand new TBS 10-71 yesterday and was surprised with how hot it got. Talked to their tech support and they said it was normal. They get hot when breaking in. And start binding a little.
The worst part was they said the first pull would be the best one due to the heat.
Kind of negated any more tuning to get to the HP number targeted. If every run made less HP how would you know if you made any improvements?
Had to let it cool down for 3 hours just to see if it would repeat the first pull.

[blownzoom440]

thanks for the reply!
is that for a gas aplication?thay told me the teflon was gapped bigger for a gas aplication due to the heat.i hat waiting for things you cant controle like that.i was thinking on using a water spray bottle or ice bag to cool the blower between rounds at the track.it would not help cool the rotors though,just the case.what kind of fuel did you use?
good luck!!
AKA ZOOM.

[Infomaniac]

It was a pump gas deal.
And only took one pull to heat way up.

[blownzoom440]

what can i say after that accept i will tune it like yourself each time it runs and adjust as needed,keeping the fuel on the rich side to be safe.i have been using stock holley 850's for 2yrs.what carbs are you using,or injection?
have you thaught about the water/meth injection to help cool the mix?

[Kindsvater Flat]

Mopars suck!

[DEL51]

I saw an add for an injection system that misted the water or water alcohol solution at 140 psi.Info, with your resouces and brains, this would be a fun trial. I would think it would be quicker in a car because of the weight and more consistant. An easy comparison would be a larger gas type blower, say, a 1271, spinning lower rpm's. I Think the 440 is good at 12-14 lbs with 110 fuel. Maybe the teflon is for racing only. Do they make a high helix that has no teflon and is more effecient? What about the BDS Air Loc rotors? what is their deal?

[blownzoom440]

thanks del!
i am getting rid of my BDS.i can e-mail you reasons but want to move on to a better situation.i do only race the car and that is what the teflon blower is for that i got.i guess i will have to wait and see.i have the water injection from snow ferformance.wait and see if i need it right away or not.the high helix from other co's is too much $$ for my budget.
my brother makes 600+ hp,1300cc motorcycles turbo intercooled.check out suzukihayabusa.org he has built over 500 of these in the paot 4 yrs.
THANKS FOR THE REPLY DEL51!

[oldbuck40]

i hope you dont mind me stopping in.i needed to go to a source with experiance.i am not a rookie with boost.i just got a new TBS 8-71 with teflon for better performance than the old 1 without strips from another company.i have been running 8lbs in my car for 2 yrs.what i am interested in is.the heat generated by the teflon with 8 to 14lbs or = to 5% underdriven to 5% overdriven running on gas[110sunoco]i have been able to go with 34 degrees timing with that fuel,8.8cr static,95cc openchamber iron heads.
THANKS!contact SDBA069 on here he has alot of knowledge on this!

[BIGJOEDUCKSLAYER]

Just a ? for you. do you have blower carbs or non blower carbs?, on my 62 nova with 408 6-71 12psi I had overheat problems because power valve was not opening be bottom of carb always has vacum.I blocked off valves and whet up 12 sizes on jetts. motor runs 210 on hottest day, street-strip car.
I did one pull on chassis dyno and @ half track half throttle broke drive-line in halve. 409hp@rw BIG JOE

[blownzoom440]

oldduck40 i will try to connect with the member!
bigjoeduckslayer
i have stock carbs with NO power valves.i was told i did not need them with a race motor.i jetted up from 80 w/pv to 95squared without pv and tuned it at the track to 88/90jets[best mph] w/36 squirters.i was using #7NGK plugs and dropped it to #8NGK for more boost.i will keep those in for the new blower also.MSD 7-al ignition,billit dist.i have a good driveline[all new]dana 60,mosor axles/35 spline,mild steel driveshaft w/solid 1350 joints.
are you getting the driveline togather for more fun?
thanks!