Third Generation F-Body Message Boards

 
Page 1 of 10
1
2
3
4
5
Last »
Search: Posts Made By: JoBy
Showing results 1 to 50 of 500
Search took 0.40 seconds.
Forum: Power Adders
06-09-2008, 02:56 PM
Replies: 29
Views: 822
Posted By JoBy

Re: Need more power.

Why didn't you get a dual 3" instead? That must be worth at least an extra 50 hp over 2.5".
Forum: Power Adders
05-26-2008, 09:47 AM
Replies: 51
Views: 4,883
Posted By JoBy

Re: How much boost…

I can report that my 1984 stock bottom end is down in the high 10s now and that is with a BAD 60 feet time.

60 foot - 1.827 s
1/8 mile - 7.245 s, 169.85 km/h ( 105 mph )
1/4 mile - 10.862 s,...
Forum: Power Adders
03-20-2008, 05:58 AM
Replies: 10
Views: 753
Posted By JoBy

Re: How many lbs. of boost on a HSR

No problems with 20 psi boost.

http://www.joby.se/corvette/mods/2005-10-03_hsr/TN_DSC05333.JPG (http://www.joby.se/corvette/mods/2005-10-03_hsr/DSC05333.JPG)
Forum: Power Adders
03-13-2008, 07:03 AM
Replies: 2
Views: 900
Posted By JoBy

Re: question turbo + tbi

For 10psi boost you might be able to keep the stock computer and run a FMU. You need a 2:1 or something like that. A TPI FMU will raise fuel pressure way too much for a TBI. (because a TPI has three...
Forum: Power Adders
02-12-2008, 08:37 AM
Replies: 77
Views: 15,056
Posted By JoBy

Re: Why dont top fuel cars use turbos?

The limit for the human body is still not reached with todays Top-Fuel.

http://www.dragracingonline.com/features/miller_b1.html

In 1979 Sammy Miller broke the 300 mph barrier in Europe, at...
Forum: Power Adders
02-11-2008, 07:39 AM
Replies: 61
Views: 46,061
Posted By JoBy

Re: martin turbo system

I have not had any problems with my oil return. It is a bigger pipe but I also use a modified fuel pump block off plate.

You can see the pipe in some pictures here:...
Forum: Power Adders
02-07-2008, 07:13 AM
Replies: 61
Views: 46,061
Posted By JoBy

Re: martin turbo system

http://jobyteknik.homeip.net/fredrik/Camaro/martin_turbo_systems/03_3.jpg

http://jobyteknik.homeip.net/fredrik/Camaro/martin_turbo_systems/64_3.jpg
...
Forum: Power Adders
01-22-2008, 01:07 PM
Replies: 16
Views: 1,317
Posted By JoBy

Re: Anyone market a roots type SC which mounts to the top of the engine?

Did you see the new Corvette ZR1 ?

It is supercharged and intercooled.

http://corvettezr1.info
Forum: Power Adders
01-22-2008, 03:36 AM
Replies: 16
Views: 1,317
Posted By JoBy

Re: Anyone market a roots type SC which mounts to the top of the engine?

http://www.holley.com/types/1993-95%20GM%20TBI%20Trucks%20-%20144%20Series.asp
Forum: Power Adders
01-20-2008, 07:20 AM
Replies: 2
Views: 741
Posted By JoBy

Re: Blown LSX Stock style ignition vs front mounted dist at high power levels

Individual coils are better but to get real high spark energy you need one MSD-box for each coil.
Forum: Power Adders
01-19-2008, 08:40 AM
Replies: 41
Views: 5,628
Posted By JoBy

Re: single turbo kit built for a friend in Chicago

It is one thing I really like with that design ... clearance to the spark plug wires!

When I made my turbo headers that was one of my main conserns. Mine is a simpler design but it worked well.
...
Forum: Power Adders
01-16-2008, 11:22 AM
Replies: 5
Views: 1,005
Posted By JoBy

Re: Considering LSX swap with Procharger. How can I mount the blower?

What about the LS9 engine? It might clear the hood with the supercharger.

http://corvettezr1.info/wp-content/gallery/zr1-engine/LS9-engine4.jpg

http://corvettezr1.info

6.2L
10.5 psi
620...
Forum: Power Adders
01-16-2008, 01:44 AM
Replies: 16
Views: 942
Posted By JoBy

Re: Started dyno and trouble hit

An 1:1 regulator is what the stock one is. With that the fuel pressure (on a gauge) rises with boost, 1 psi for each psi boost.

If pressure is dropping with boost, then the pump can't deliver...
Forum: Power Adders
01-13-2008, 04:24 AM
Replies: 51
Views: 4,883
Posted By JoBy

Re: How much boost…

Compressor ind/exd 75mm/102mm.
Turbine ind/exd 98mm/87mm.
Forum: Transmissions and Drivetrain
01-12-2008, 08:19 AM
Replies: 4
Views: 761
Posted By JoBy

Re: mid 80s trannys

Both the th700r4 and the 4L80E are 4-speed transmissions with lockup.

The Corvette 6-speed is a manual transmission.
Forum: Power Adders
01-12-2008, 05:29 AM
Replies: 51
Views: 4,883
Posted By JoBy

Re: How much boost…

I like it. The tuning software uses DOS and that is atually a good thing. The old laptop I use had a hd crash but I made a bootable floppy with the tuning software :)



I don't know. They were...
Forum: Power Adders
01-11-2008, 02:56 AM
Replies: 51
Views: 4,883
Posted By JoBy

Re: How much boost…

I will try to get more out of my engine in my 1984 Corvette.

Stock engine block.
Stock crank.
Stock rods.
Stock pistons.
ARP bolts.
CompCams 12-404-04 cam (LSA 114, duration 222/225 @0.050,...
Forum: Power Adders
11-21-2007, 12:08 PM
Replies: 222
Views: 7,355
Posted By JoBy

Re: Kaiser Roto-charger on my Trans Am

http://www.vs57.com/kaiser.htm

That supercharger could probably be worth something for someone restoring an old original ... If you use it and try to make some power with it then the supercharger...
Forum: Power Adders
11-11-2007, 02:27 PM
Replies: 13
Views: 6,668
Posted By JoBy

Re: twin turbo oil line routing

I use the one above the water pump for my single turbo installation.
Forum: Power Adders
11-11-2007, 01:44 PM
Replies: 13
Views: 6,668
Posted By JoBy

Re: twin turbo oil line routing

It is pressure there too, it is after the filter.

You have four locations where you can get oil.

Using an oil filter adapter.
Using the oil temp sensor above the oil filter.
Using the oil...
Forum: Power Adders
11-10-2007, 07:50 AM
Replies: 13
Views: 6,668
Posted By JoBy

Re: twin turbo oil line routing

This is the oil temp sensor on my Corvette

http://www.joby.se/corvette/mods/2001-0X02_oil/TN_DSC01138.JPG
Forum: Power Adders
11-09-2007, 07:43 PM
Replies: 78
Views: 34,342
Posted By JoBy

Re: C4 Corvette single Turbo by JoBy

I don't know exactly.

I took the Corvette on three longer trips this summer.
Those three trips add up to about 500 miles.
I have driven a lot more than that locally.
Forum: Power Adders
10-25-2007, 02:19 AM
Replies: 11
Views: 1,789
Posted By JoBy

Re: Hidden Nitrous system.

https://www.thirdgen.org/forums/power-adder/178164-hidden-nitrous-under-plenum.html

Some pictures and ideas there
Forum: Power Adders
10-16-2007, 02:21 PM
Replies: 78
Views: 34,342
Posted By JoBy

Re: C4 Corvette single Turbo by JoBy

I found a typo in the cam duration. I had written 222/225 instead of 222/226 as it should be.

So your GT4294 has the following spec.

Compressor:
Inducer 69 mm
Exducer 94 mm
A/R 0.60
...
Forum: Power Adders
10-16-2007, 09:37 AM
Replies: 78
Views: 34,342
Posted By JoBy

Re: C4 Corvette single Turbo by JoBy

Already posted above. It is not a big cam.

CompCams 12-404-04 cam (LSA 114, duration 222/226 @0.050, lift 0.464/0.464 )
Forum: Power Adders
10-16-2007, 02:51 AM
Replies: 78
Views: 34,342
Posted By JoBy

Re: C4 Corvette single Turbo by JoBy

I already bought a GT4594 but I think the compressor inducer is a bit on the small side. The exhaust side is much bigger than the GT4288.

Compressor:
Inducer 63 mm
Exducer 94 mm
A/R 0.66
...
Forum: Power Adders
10-15-2007, 02:08 PM
Replies: 78
Views: 34,342
Posted By JoBy

Re: C4 Corvette single Turbo by JoBy

GT4288N , No typo.
I think that it is a GT42 with the same compressor as the GT4088.

Compressor:
Inducer 64.7mm
Exducer 88mm
A/R 0.72

Turbine:
Inducer 82mm (=GT42)
Forum: Power Adders
10-15-2007, 07:30 AM
Replies: 78
Views: 34,342
Posted By JoBy

Re: C4 Corvette single Turbo by JoBy

Stock engine block.
Stock crank.
Stock rods.
Stock pistons.
ARP bolts.
CompCams 12-404-04 cam (LSA 114, duration 222/226 @0.050, lift 0.464/0.464)
CompCams 858-16 Pro magnum Hydraulic lifters ...
Forum: Power Adders
10-15-2007, 06:52 AM
Replies: 78
Views: 34,342
Posted By JoBy

Re: C4 Corvette single Turbo by JoBy

On 18/9 I went to the dyno shop.

Before I went there I activated lockup in the converter during WOT and I felt a major differance. It became another animal when the tranny shifted to third an...
Forum: Power Adders
10-15-2007, 06:42 AM
Replies: 78
Views: 34,342
Posted By JoBy

Re: C4 Corvette single Turbo by JoBy

On 25/7 I went to a test and tune day on a airstrip and ran three times with similar results.

On one of the runs I lined up against a Chevelle with a cage, real big tires and a 720+ hp 572 cui...
Forum: Power Adders
10-15-2007, 06:36 AM
Replies: 78
Views: 34,342
Posted By JoBy

Re: C4 Corvette single Turbo by JoBy

I think that it is time for an update.

I ran the Corvette without turbo the last summer and I had one problem after another. I had some fuel problems and rewired to semi-sequencial injection. (The...
Forum: Power Adders
09-25-2007, 02:40 PM
Replies: 5
Views: 1,095
Posted By JoBy

Re: the e-ram works: fact or fiction?

Still fiction, even on the wee 2.8l engine.
Forum: Alternative Port EFI Intakes
09-05-2007, 01:28 PM
Replies: 60
Views: 15,207
Posted By JoBy

Re: Single-Plane Discussion

Proof:

http://jobyteknik.homeip.net/fredrik/Camaro/2005-06-30_started/TN_iroc454turbo.JPG (http://jobyteknik.homeip.net/fredrik/Camaro/2005-06-30_started/iroc454turbo.mpeg)
Forum: Alternative Port EFI Intakes
09-05-2007, 05:58 AM
Replies: 60
Views: 15,207
Posted By JoBy

Re: Single-Plane Discussion

On my fried Fredrik's BBC trubo IROC we made an elbow that cleard the stock hood. That was with an air-gap single plane. The trick was to go to the side instad of forward.
...
Forum: Power Adders
09-05-2007, 05:34 AM
Replies: 19
Views: 2,361
Posted By JoBy

Re: HSR / Miniram instead of TPI for Supercharged ZZ4?

Wrong! What you say is true for a displacement supercharger, like a roots, but not for a centrifugal supercharger.

A centrifigal supercharger makes boost as a function of RPM. A more restrictive...
Forum: Fabrication
08-10-2007, 03:32 AM
Replies: 45
Views: 2,154
Posted By JoBy

Re: Official "Real" Functional Louvers Thread

I don't see why you want the louvers to move with the throttle. That part over the hood is a low pressure area. At speed functional louvers will let hot air out, not cold air in.

They will went...
Forum: Fabrication
05-08-2007, 03:33 AM
Replies: 31
Views: 40,099
Posted By JoBy

Re: SBC Drawings or CAD Files

These are the same ones as individal files.

http://web.telia.com/~u60113744/misc/chevy_sb/eng1.gif

http://web.telia.com/~u60113744/misc/chevy_sb/eng2.gif
...
Forum: Power Adders
05-03-2007, 01:14 PM
Replies: 42
Views: 10,777
Posted By JoBy

Re: AIR pump to evac. crankcase instead of PCV under boost?

All stock parts. You might want a PCV from a turbo application as the stock one might not be designed to close during boost.
Forum: Power Adders
05-03-2007, 09:16 AM
Replies: 42
Views: 10,777
Posted By JoBy

Re: AIR pump to evac. crankcase instead of PCV under boost?

I don’t think that I’m following, do you mean that you have a hose fitting as part of the valve cover breather assembly and a hose going from there to the ducting in front of the turbo?




I’m...
Forum: Power Adders
05-01-2007, 04:30 AM
Replies: 2
Views: 733
Posted By JoBy

Re: turbo 305

Yes.


No.


You have weld exhaust and intake piping. You have to make room for the turbo somewhere. You have to get more fuel into the engine during boost. You have several options.

...
Forum: Suspension and Chassis
04-20-2007, 07:31 AM
Replies: 10
Views: 12,473
Posted By JoBy

Re: Mumford Linkage

Panhard & Watts:

http://www.lateral-dynamics.com/products/source/_PanhardWattsWeb.jpg

On this picture the pivot point of the watts link is on the chassis, usually it is on the axle.
Forum: Power Adders
04-16-2007, 05:58 AM
Replies: 2
Views: 910
Posted By JoBy

Re: superchargers, roots vs sidemount.

Adiabatic Efficiency

http://www.chevyhiperformance.com/techarticles/49378_superchargers_blowers_info/
Forum: Power Adders
04-07-2007, 06:59 AM
Replies: 2
Views: 553
Posted By JoBy

Re: Turboing a TBI 357

It is no problems running boost thru a TBI. The largest injectors you can buy are two 90 lb/hr, a total of 180 lb/hr. That is about the same as you get on a stock 350 TPI. You can raise fuel pressure...
Forum: Power Adders
03-02-2007, 03:46 PM
Replies: 855
Views: 265,856
Posted By JoBy

Of the Porsche?

Of the Porsche?
Forum: Engine Swap
02-19-2007, 04:30 AM
Replies: 24
Views: 915
Posted By JoBy

If you have a gasoline vehicle then E85 is the...

If you have a gasoline vehicle then E85 is the easiest alternative fuel to convert to. You need about 30% more fuel volume for the same amout of air. If you have a carb you just change the jetting.
...
Forum: Power Adders
02-17-2007, 08:07 PM
Replies: 190
Views: 32,048
Posted By JoBy

Yes, you get max pressure at max rpm, but not...

Yes, you get max pressure at max rpm, but not while blowing into a sealed box. That would be way left of the surge line. By allowing enough air flow to be on the right side of the surge line you...
Forum: Power Adders
02-17-2007, 02:48 PM
Replies: 190
Views: 32,048
Posted By JoBy

It is a differance between a displacement...

It is a differance between a displacement supercharger and a centrifugal supercharger.

What you are saying is true for a displacement supercharger, not for a centrifugal supercharger.

On a...
Forum: Power Adders
02-17-2007, 09:28 AM
Replies: 190
Views: 32,048
Posted By JoBy

Wrong! Learn how to read a compressor map! ...

Wrong!

Learn how to read a compressor map!

http://www.vortechsuperchargers.com/maps/s-trim_map.gif

Look for example at the red line labeled 35.000 rpm. That is the impeller speed in the...
Forum: Power Adders
02-17-2007, 05:39 AM
Replies: 190
Views: 32,048
Posted By JoBy

You can not compare boost on one engine with...

You can not compare boost on one engine with boost on another engine that is built differently, that is true.


If you keep everything constant (use the same engine and the same temperature of the...
Forum: Power Adders
02-16-2007, 05:23 PM
Replies: 190
Views: 32,048
Posted By JoBy

A pressure ratio of 1.6 is 0.6 over atmospheric. ...

A pressure ratio of 1.6 is 0.6 over atmospheric. 0.6*14.7=8.8 psi boost.
Showing results 1 to 50 of 500
 
Page 1 of 10
1
2
3
4
5
Last »


 
Forum Jump


All times are GMT -5. The time now is 06:42 PM.