Installed 366 gov spring

[glhs]

Installed it last week. Not too hard to do. It would rev to 3500 in neutral before, now probably 4000+? Was told the valves will float at 3400. I did accidently take it to 3700. I have been told I could break the cam by spinning it over 4100. Is this true? Have a dyno day on the 1st; will be interesting to see if it will hold the fuel to 3500 or so. I have the 60# valve springs on hand. Will have to install by the 1st. Plan to run down the track at Bandimere on the 5th.

Kurt

 

[bgilbert]

The 366- 3200rpm spring will only 'fuel' to 3200 rpm. A dyno graph will show your power dropping off (pump defueling) at 3200rpm. Say at 3200 you have 400hp, well at 3500 you may still have 350hp etc. Did you grind off the AFC lever? I'm told in Colorado with a ground afc lever you won't pass a snap/smog test.



Get those 60# springs in you won't have to worry much about floating the valves. I'm told KD tool #2078 is the preferred valve spring compressor, I just picked one up from Napa, haven't tried it yet though. It's a screw on type and not cam action like the Lisle tool Geno's sells. Greenleaf had terrible luck with that Lisle tool. He had to modify it.



Will that SBC FE stand up to 4000rpm launches :-laf ?

 

[Greenleaf]

The valve spring swap is cake work. Don't let it confuse you. Don't read ANY publications on performing said swap. You'll be lost into thinking that you have to stand on your left ear whist chewing Mail Puch Tobbacy.



PM me if you need any tips.



Also, the Lisle tool is very easily converted to the screw (bolt) type, however how on tha gree earth are you going to work the darn thing with the handle at valve spring level. I mean EVERYTHING is in the way... ... ... ...



Check out my readers rigs pics in the Valve Spring Swap section.



GL

 

[glhs]

Before it defueled at 3000 rpm. So I only raised it by 200? Oh well. I will be checking my dyno sheet. It will look cool though if it records up to 120? mph ( @ 3600) or so.

I did not grind off the foot lever. Was in a hurry. Was'nt sure which one ( I saw 2 that kinda fit the description) or from which side to grind off.

I don't think I would try a 4000 rpm launch. I think the highest so far is about 2800.

I'll check out your pictures Greenleaf.

Kurt

 

[BushWakr - RIP]

glhs,,,,,there's a difference between defueling and holding max fueling to physical governed speed... . one= lots more juice. .



pb...

 

[glhs]

Dynoed yesterday

Took it up to 122 mph (approx. 3650 rpm) and still was holding the fuel pretty well. I backed out only because I did'nt get around to installing my 60# valve springs yet. Corrected hp on the Dynojet showed peak hp @ 90 mph (534) and peak torque @ 82 mph (1105). At 122 mph was showing 450 hp and 650 torque. Made over 500 hp from 77 mph to 107 mph.

Kurt

 

[bgilbert]

Congradulations on the big HP!!! Guess that htb2 and injectors helped out a bit.

 

[swankmetal]

yowsa! congrats on the #'s. impressive.



dave

 

[1stgen4evr]

Let me add a word of caution. I have a block that (for whatever reason) had a failure of the camshaft. When the cam broke, a section fell into the workings of the crank and said section exited the side of the block. This engine was NOT turned up. I can just see the oil trail if that happens when the engine is really tight. Install the heavy springs.



James

 

[glhs]

I did say corrected hp. I know they used a high correction factor. We were around 5000 feet. I would say the numbers are nearly dead on for this elevation at the FLYWHEEL :{

Kurt

 

[Greenleaf]

Kurt,



I'm assuming you have methanol that figures into this HP equasion? If not, we all need to get advise from you on how to tweak our pumps.



-S

 

[glhs]

Yes, with methonal. Showed 460 hp without.

KTA pump head one of these days, I hope.

Kurt



On edit; I can take a picture of the dyno sheet and some pics of my truck, but I am totally computer illiterate. I don't have a clue how to get them off the camera and onto the computer. If someone wants to take the time to call me and walk me through it, I would post them. This is also why I don't have any readers rigs pictures. 303-506-5135. 6 am - 10 pm MST