3.4 Dyno Chart

[stownsen914]

Thanks William for sharing the motor specs. The new heads and the Super Veloce motor will be fantastic I'm sure, will be interesting to hear more about them.

[KNIGHTRACE]

I am glad to help anyone in the air cooled world..my email is knightrace@mac.com WILLIAMJOHNKNIGHT SKYPE AND 615.969.4917 I am out of the states often but I will email or Skype, I have WhatsApp. William Knight

[slow car]

What would be the max safe revs for a 3.2 -3.4 with std rods and ARP rod bolts/nuts.
Balanced engine je pistons.
Ti retainers DC80 cams, stronger valve springs.
On the dyno the HP still wants to climb past 7500. Race use only

Values in KW ie 283 RWHP @6850
240 Ft lb @ 5350

[stownsen914]

I realize that you didn't ask this, but one thing that stands out on your dyno sheet is the sharp decline in power just over 7000 RPM, which seems to coincide with the AFR going very lean. Did your tuner/builder comment on that?

[Peter M]

Originally Posted by stownsen914

I realize that you didn't ask this, but one thing that stands out on your dyno sheet is the sharp decline in power just over 7000 RPM, which seems to coincide with the AFR going very lean. Did your tuner/builder comment on that?

The throttle was closed at about 7,200rpm.

[slow car]

Yes the MSD rev limiter was set at 7500 and the soft limit seams to kick in about 7200 rpm

[stownsen914]

Slow car - I’m making some similar upgrades this winter to a 3.5, so I’m watching your posts with interest, as a preview of what to expect. Are the heads on your motor ported, or stock 3.2?

Scott

[slow car]

Hi Scott, the valves and heads are STD 3.2 just all matched ported intake ,gaskets and exhaust.
In the new year i will put the 1.3/4 headers on and the 50mm PMOs and re run the car on the same dyno.
Im going to bring the rev limiter back to 7200 for some safety.

[Geronimo]

Jeff,

I am about a year away from a rebuild on my SC, did that 3.2SS start out as a large or small port SC? That is serious power for a 3.2 I would love to have a motor land in that place.

[Jeff Alton]

^^^^ Geronimo,

Yes, the 3.2SS was a small port motor. Stayed a small port motor but we smoothed out the guide bosses. This motor is amazing, super fun, great power everywhere.

Cheers

[Geronimo]

Do you need the twin plug with only 10.5 comp, or is it a safety margin thing?

[Jeff Alton]

The theory is you need twin plug. We have never tried with single plug, but others may have.

[stownsen914]

Originally Posted by slow car

In the new year i will put the 1.3/4 headers on and the 50mm PMOs and re run the car on the same dyno.

Gotcha, thanks for sharing. Will be interesting to see gains from the bigger carbs and headers. May push the hp peak a little higher in the RPM range, but let's see.

Scott

[KNIGHTRACE]

Slow Car I looked up old dyno on clients motor as close as I could find. I will try to add it here the O2 sensor was only used on one side so ignore it. I ended up going to 43 mm chokes and the motor is exceptional. Do not port the 3.2 heads there good as they are and a larger intake valve will help. I will try to upload dyno sheet. The RPM limit is determined by valve springs and above 7K you need to cross drill the crankshaft and do slight mods to the case. 7500 for real short burst are ok. Thanks, William

[KNIGHTRACE]

[Geronimo]

Thanks, i'm trying to get a very rough outline of what I will need when I want to redo my engine. I really like the look of the 3.2ss, I think it would be a lot kinder to my new 915 making power little higher in the revs compared to larger set ups.

Nice to see you making good power from the small port heads too.

I have 46mm PMO (prev owner) on the car and have considered going ITB injection for better cold start and consistency.

I may PM you to get a sense on the cost of the 3.2SS you posted.

Thanks for the help guys

[KNIGHTRACE]

I you have 46 PMO's I have cams that will make them start in cold weather. If you have them use them. KNIGHTRACE@MAC.COM Thats, William
P.S. If someone gives me there email I will try and share the 3.4 dyno chart I cant get it to upload here.

[Geronimo]

Yea, I want to put together a plan that makes sense and gets me near that nasty 3.2ss in the most effective way. I'd rather not waste money, so measure twice cut once.

I think the 3.2ss makes the most sense for where I am starting from.

Thanks Knight, I am sure we will be talking in the future, your support here is always great!

Keep it up guys I love it.

[KNIGHTRACE]

Here is a very accurate 3.4 pump gas motor TQ and HP

[john@poolcovers]

Hi Knightrace,
Thanks for sharing.
What revs are you at 29 degrees?
What compression Ratio?
Thanks