HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

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6.3L 750+HP Landshark!

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Re: 6.3L 750+HP Landshark!

Post  MuscleSchnitzzle on Wed Sep 22, 2010 11:30 pm

It'll be Monday before I can put up video. Ran into a problem. Car was great first night. Then went down hill quickly. Loosing vacuum, studdering, backfiring through carb. After pulling hair all week and checking all the easy stuff, I finally pulled the valve covers to check lash. Had one rocker sitting on it's side. Sad

It apparently was not locked down well and walked itself out. The good news, push rod and valve are fine. Rocker is also fine. Got lucky it just fell of to the side. So now I will be checking and adjusting all of them this week. Looks like I may also need new longer studs. Valve and pushrod are +100 but it has standard 7/16" studs. Only lets about 4-5 threads of the poly lock grab on. Not going to bet 7000rpms on that.

Here's a video of my issues from yesterday. You can hear in the idle one of the cylinders is off. You also get the carb backfire at the end...


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MuscleSchnitzzle

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Re: 6.3L 750+HP Landshark!

Post  cfgioja on Wed Sep 22, 2010 11:34 pm

you did get lucky. Hope all is well.
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Re: 6.3L 750+HP Landshark!

Post  suboptimalfit on Thu Sep 23, 2010 11:12 pm

That, kids, is how a Porsche 928 should sound! (minus the rocker issue) Love the "nervous idle @1200 rpm! thanks for the inspiration.

suboptimalfit

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Re: 6.3L 750+HP Landshark!

Post  MuscleSchnitzzle on Mon Sep 27, 2010 11:19 pm

All fixed! I'll get a video up this weekend when I can take her out again.

Been a hair pulling few days getting her to run right. Had to completely strip and reset the carb, change jets, power valve, accelerator pump cam and nozzle, plus reset 4 corner idles once throttle plates were correct. I had too much idle transfer slot showing and was having idle issues. I had to open the secondaries a bit to control idle. I also decided to lock the distro out at 38* with no mechanical advance. 10* of vacuum advance still used. I stripped out a carb bolt and had to helicoil the intake. I also went through and reset the cold valve lash. Several times. Apparently I had them too tight and I had two valves not seating. Caused more backfires. This was my first time with roller rockers. I was pulling the feeler straight out. A roller tip will allow a lot more compression and still let the feeler slip out easily. I had to drag it sideways across the roller to get it right. Finally got everything in line and she started up and she smoothed right out. Then set the lash again hot.

She now idles at 1000rpms with a nice lope. Screams like a banshee when you blip the exhuast. I need the larger tires now. In 1st the 295s are a joke. Even in second they just light up. Guess I'll start working on the wheel flares for the 335s and send my wheels out to be welded. I haven't had a chance to drive her more than 2 miles. Baby steps. This weekend if all goes well, I hit the twisties.. Twisted Evil

I also need to figure out how to gain 1/2" of hood clearance. My cleaner hits the hood when shut which is fine. However I have not put on my nitrous plate yet and it's about 1/2" thick.

MuscleSchnitzzle

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Re: 6.3L 750+HP Landshark!

Post  xschop on Mon Sep 27, 2010 11:25 pm

Man, 295's are skinny, now that's a statement....Nice work and glad the valve didn't burn/blow.
Question, does the 928 tranny have slower shifting because of older synchro design? And do the newer synthetic gear oils help?
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xschop

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Re: 6.3L 750+HP Landshark!

Post  MuscleSchnitzzle on Mon Sep 27, 2010 11:36 pm

I haven't notice slower shifting. I guess it's compared to what. Once the synchros go though it can really suck. I have a short shifter and good synchros. My original tranny only has 29000 miles on it. It shifts pretty quick and responds well to heel-toe. It is a dog leg pattern so you have to go up, over, up quickly. No quick diagonals.

However my point of reference is my 73 911, 1970 Mustang Mach I (428SCJ) with hurst top loader, 1985 Trans Am and an 89 turbo Shelby Daytona. The Daytona had the best with a 5 speed getrag. None are what you would call a true sporty shifter.

MuscleSchnitzzle

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Re: 6.3L 750+HP Landshark!

Post  xschop on Mon Sep 27, 2010 11:51 pm

Cool, I've heard that the 928 boxes were a little slow due to the shifter design, but are stout where it counts on the gear teeth, I PM'ed you if you can check your PM's now.
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xschop

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Re: 6.3L 750+HP Landshark!

Post  cfgioja on Tue Sep 28, 2010 12:43 am

glad you got it running good now. You know the next time you have it out we need a video, right?

keep us up to date. We dont have many 928 conversions on here.

Take it easy.
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cfgioja

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Re: 6.3L 750+HP Landshark!

Post  modenas on Tue Sep 28, 2010 12:45 am

i agree, need a vid, im still in shock that we have a 928 on our forum, and i like it! congrates
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Re: 6.3L 750+HP Landshark!

Post  suboptimalfit on Wed Sep 29, 2010 1:01 am

time for the tape measure and a bit of clay rolled out 2" long... (placed on the lid of the air cleaner at the four compass points) Wink
they make MANY different drop base air cleaners. (from flat all the way to 2").
if you look on Renegade's pix page, you'll see many different styles of carb/ air cleaner setups.
some intake manifold height specs stolen from each manufacturer:
Edelbrock Performer: front carb pad, 3.50". rear of carb pad, 4.60".
Edelbrock Performer RPM : front, 4.00". rear, 5.30".
Weiand Stealth: front, 4.18". rear, 4.50".
-might be interesting to see what you have at the carb choke horn (if not milled off) to the underside of hood.

suboptimalfit

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Re: 6.3L 750+HP Landshark!

Post  MuscleSchnitzzle on Wed Sep 29, 2010 6:14 pm

Got the hood clearance issue solved. Spectre makes a nice cold air set up for carbs that is only 2" tall. Should get me the 1/2" I need, plus look a little cooler than a 14" round cleaner.

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I'll turn the intakes backwards to line up with my hood scoops. I'll get yellow filters to match the engine bits.

Only $200 total.

MuscleSchnitzzle

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Re: 6.3L 750+HP Landshark!

Post  suboptimalfit on Wed Sep 29, 2010 8:26 pm

similar boat here, tho i was going for the "hide the engine" look with a carbon fiber, NASCAR style- rear facing, round to flat wing- 19"x2" element assembly. wide and flat, just like the 928! Very Happy
Just curious- HOW much room DO you have? (off the carb pad).

suboptimalfit

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Re: 6.3L 750+HP Landshark!

Post  MuscleSchnitzzle on Wed Sep 29, 2010 10:25 pm

Right at 2.5". Of course different intakes change things. The RPM Air Gap is pretty tall, somewhere between a medium and high rise.

MuscleSchnitzzle

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Re: 6.3L 750+HP Landshark!

Post  MuscleSchnitzzle on Sat Oct 02, 2010 8:40 pm

I work too damn much. Chipping away at things for 20 minutes a night takes forever. Had to work this morning but got on the car by 3pm. Finally got things dialed in better. Yeah!

Had to switch the accelerator pump cam for a quicker shot off the throttle. Got timing adjusted spot on, 22* at idle, 38* all in by 2800rpms. Vac advance adds 12* under light load. Got the valves pretty close cold. I need to go back and do them hot, should quiet up the valve train a bit more. Solid lifters are way louder than I thought they would be. I'm going to bring the idle down to 1000rpms tomorrow.

Here's a crappy video showing where I ended up tonight. Dark and hard to see (Except for my Ricer Glo gauges...) but you get the point. HUGE improvement. Carb spits once under hard repeated revs, hopefully setting lash hot will help with that. Or I can go up another set of jet sizes. She's not blowing rich yet.

Enjoy. Hopefully I can get a better one in the day light tomorrow.

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MuscleSchnitzzle

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Re: 6.3L 750+HP Landshark!

Post  suboptimalfit on Sat Oct 02, 2010 9:00 pm

that vid rocks! Twisted Evil
your backfire sounds like a lean snap-go a touch fatter on jetting. sooooo close now!

suboptimalfit

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Re: 6.3L 750+HP Landshark!

Post  MuscleSchnitzzle on Sat Oct 02, 2010 9:06 pm

Already changed front jets from 72 to 76. I guess I need to try 78's. Then I'll have to adjust secondaries after I drive her. Can't get the vacuum secondaries to open in neutral, need load. I just played with the idle again and got it to a smooth flat 1000rpms. Notice the lope a little more now.


MuscleSchnitzzle

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Re: 6.3L 750+HP Landshark!

Post  suboptimalfit on Sat Oct 02, 2010 9:17 pm

you should never see or feel the secondary "kicking in" just smooth addation of power! as you said it needs to be under load- do you have the holley spring chart? (tells you the rate of opening at what rpm). it comes with the 2ndary spring kit- Holley #20-13.

suboptimalfit

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Re: 6.3L 750+HP Landshark!

Post  MuscleSchnitzzle on Sat Oct 02, 2010 9:56 pm

No need. The proform carb has adjustable vacuum secondaries. No spring changes just a screw you dial in more or less vacuum to open. Makes it real nice to fine tune on the fly. Hit the go pedal, stop turn screw and repeat until it's done. Don't even need to turn the car off.

MuscleSchnitzzle

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Re: 6.3L 750+HP Landshark!

Post  suboptimalfit on Sun Oct 03, 2010 10:44 am

forgot to ask, what are you running for rear jets? as you wing the throttle, 2ndary might be a touch lean...
as for the "dial in secondary screw"- do you have any idea what each turn is worth? (inches 'o vac. and rpm). just curious how Quicktime sets this up. is there any paperwork/ instructions?
-sorry just a holley/demon "trial by ordeal" user here.

suboptimalfit

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Re: 6.3L 750+HP Landshark!

Post  MuscleSchnitzzle on Sun Oct 03, 2010 2:29 pm

Primaries are 76 now going to 78. Secondaries I have not changed yet so they are 82's with blocked off power valve. I will change them to 88's most likely.

There is no instruction for how much each turn equals. I would imagine it changes as the spring is compressed. ie intitially turns have less effect than once the spring is under some pressure already.

MuscleSchnitzzle

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Re: 6.3L 750+HP Landshark!

Post  the951racer on Mon Sep 17, 2012 3:02 pm

I know this is an old post but, any updates....new pics...videos??

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Re: 6.3L 750+HP Landshark!

Post  suboptimalfit on Tue Sep 18, 2012 9:37 pm

i'm not sure if i should open up this can of worms without permission-
let's just say that i was searching ebay for forged pistons and he had the engine apart...
for bigger and better things i hope! Twisted Evil

suboptimalfit

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Re: 6.3L 750+HP Landshark!

Post  the951racer on Thu Sep 20, 2012 11:50 am

hhhmmm interesting....

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Carbed LS

Post  Amille28 on Fri Sep 28, 2012 8:58 pm

I was thinking of using a carbed LS (LM7 iron block) for the ease of having the MSD ignition set up. I haven't bought an EFI fuel rail, injectors, throttle body so might be in the $ the same for the carbed setup. Do you think it will clear the hood? The SBC and LS should be pretty close in overall height. I plan on using the RH mount and torque tube adapter. I don't see any other options as RH appear to be the only ones that make the mounts and adapter plate.
Thanks!

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Re: 6.3L 750+HP Landshark!

Post  suboptimalfit on Sat Sep 29, 2012 1:45 am

i don't think you are gonna have enough hood clearance, the LS series carb manifolds are quite tall.
(i have not checked the catalog for ht. specs) most guys CAN get away with a Edel. Perf RPM and a deep
drop base aircleaner. The Air Gap is a bit taller still... (non LS stuff).
i am using a newer Weiand action plus dual plane.

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Re: 6.3L 750+HP Landshark!

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