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Low Compression Street Engine's & Tuning Techniques Idea's...How Too's on low compression Engines.

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Old 06-25-12, 04:40PM   #16
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It's always nice to be able to drive it back home after a trip to the track.
On the ride home you hear every little noise and take it easy. LOL
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Old 06-25-12, 06:53PM   #17
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Quote:
Originally Posted by sprint250 View Post
It's always nice to be able to drive it back home after a trip to the track.
On the ride home you hear every little noise and take it easy. LOL
I can imagine!!!!
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Old 08-07-12, 09:55PM   #18
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Hot this weekend. Found out that the car will run 205* uphill on the highway at 70 mph with 100* heat index outside.

Bad, good thoughts???
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Old 08-12-12, 09:56PM   #19
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I just got my 406 running this weekend and initial SOTP feel is it is gonna be a street beast.
It's an automatic so I need to get used to that setup .
Initial break in & test drives all done in 90 to 100 degree weather and the gauge never got over 185/190.Quality stock water pump,custom USA made CRAIG Manufacturing 4 core brass & copper radiator using my stock tanks,180 degree Robertshaw high flow stat,Thermal declutching fan & just using water initially.
That's with the trans cooler going to the radiator too on a 2300 rpm stall speed convertor.
I'm gonna put the trans on it's own cooler ,relocate the oil filter to the fenderwell away from the headers and add an external engine oil cooler.
It never wimpered.
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Old 08-30-12, 09:30AM   #20
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Quote:
Originally Posted by sprint250 View Post
I just got my 406 running this weekend and initial SOTP feel is it is gonna be a street beast.
It's an automatic so I need to get used to that setup .
Initial break in & test drives all done in 90 to 100 degree weather and the gauge never got over 185/190.Quality stock water pump,custom USA made CRAIG Manufacturing 4 core brass & copper radiator using my stock tanks,180 degree Robertshaw high flow stat,Thermal declutching fan & just using water initially.
That's with the trans cooler going to the radiator too on a 2300 rpm stall speed convertor.
I'm gonna put the trans on it's own cooler ,relocate the oil filter to the fenderwell away from the headers and add an external engine oil cooler.
It never wimpered.

How did the stall feel? I am going to be putting in a 2400~ish stall in the wagon with the 326..

TOO hot to work in. anything over 85 and it is a sweat fest!!!

Got any videos?
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Old 09-15-12, 04:20PM   #21
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correction on the stall speed .
It is at 2800 rpm.
Part throttle in traffic is not as snappy as a stock stall speed convertor.
The stock 2.73 rear gear has to go away.
Lower rear gear would allow rpm to come up faster and get into the convertor quicker.
That being said , even with the 2.73 and foot braking it on the launch it takes off very hard with a minimum of wheel spin. Car is flying at 3000 rpm and just begging for a speeding ticket. LOL
I have another rear end here with a 3.10 ratio but I feel best for this convertor would probably be in the range of a 3.23 to 3.55 without going totally over board and killing it for street use.
Either that or go back to a 2300 or less rpm stall speed convertor for fuel economy & street performance.
Finishing the trans cooler this weekend.
Installing a HAYDEN fan with an adjustable controller to blow on it & B&M deep pan ,just for insurance.
Our weather here has been hot (90's & 100's)for the last 3 weeks and nex week amd I don't expect anything less on race day next week.
I have it entered for an antique drags event here next weekend and will post how it does with the 2.73 gear and current stall speed convertor.
Not expecting a miracle ,just need to get it sorted out/ baselined to see what the next move is gonna be ,Oh yeah & have fun too.

For street with the 326 don't go with any higher stall speed more than what you are planning on.
If the stall speed is way higher than the predicted cruise rpm of the car the convertor will never be fully engaged past it's stall speed in the normal rpm operating range.
That will cause additional heat in the trans which = the need additional cooling for the trans so it will live in stop & go as well as below stall speed highway operation.
If you plan on towing a higher stall speed may be the wrong way to go.
Set it up for the the majority of the time/conditions for which it will be operating under.
If you know what the rear gear is and what the RPM is at your usual highway cruise speed ( I'm guessing 2200 to 2500 rpm if 2.73? Wagon with small inch motor may have lower gears than that.)you want the convertor to be spinning past stall speed well before that cruise speed rpm. Call/Email B&M or TCI and get some advice from them. Just be real about the intended use.
street - street /strip - or all out race.
That way you can select the right cam /convertor & gearing combination for the car.
Helps to know the weight too.
That will give you best fuel economy for street & highway cruise.
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Old 09-28-12, 03:09AM   #22
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Last Sunday was fun and kind of a bust at the same time.
0ver 100 degrees at the track for the better part of the day.
Car did not wimper but trans was getting hot.
Not enough trans cooler for the heat we saw there that day.
Plus had problems with my secondary throttle linkage so I had to abandon that part of the carb and just run with the primary's which killed any kind of top end.
Carb was virtually down sized sized to a low perf 250" six 2V

Car drove there and back with no issues so that was a huge plus.

Gonna pull the trans and install a converter with a stall speed between 1500 & 2000
rpm for better part throttle response and highway cruise efficieny.
2800 rpm stall speed is just too much for my current gearing to take advantage of it.
I like drag racing but this car will spend the majority of it's time on the street
Even if I ran a low to medium 3 series ratio out back the gas mileage would suffer because of the 2800 stall speed.
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Old 09-29-12, 06:27PM   #23
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where are the pictures???
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Old 10-09-12, 02:29AM   #24
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Default A Very Hot Day It Was

The 2VEE pic is exactly what happened to us. Too hot to get mad about it!
It was a day to sort it all out & have some fun.
It ain't real pretty(yet) but it does run down the highway pretty good.

With cooler weather , a "true" 4V carb , 3 series rear gear & tires that hook, it can only get better at the track.

Special Thanks To :
EAE
RRE
PPR
BOP
KUSUMOTIVE
ED HALE PERFORMANCE MACHINE
KIETH"S DISCOUNT TRANSMISSION
BROADWAY AUTO ELECTRIC
ART"S RADIATOR SERVICE
FLEET DRIVELINE SEVICE
CITY FRAME & WHEEL
WEST AIR WELDING SUPPLIES
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ALL STAR GLASS
DISCOUNT TIRE
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MARSHALL'S INDUSTRIAL HARDWARE (one of the last few "Honest to God" real hardware stores)
CARQUEST, NAPA ,AUTOZONE,KRAGEN/OREILLY,E&M AUTO PARTS,BORDER PARTS,FIBER TECH ,RACE READY,
OFF ROAD WAREHOUSE ,JEG"S ,SUMMIT................Ad infinitum.
ALL THE WRECKING YARDS IN SAN DIEGO COUNTY
Thanks to LOU & PZ for the priveledge to post here for the last 10 years

THANKS TO MY "CREW" For helping to make it all happen again :
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TO ALL IN THE NEIGHBORHOOD FOR NOT CALLING THE COPS WHEN WE TESTED OUT IN THE STREET
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Last edited by sprint250 : 10-09-12 at 02:44AM.
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Old 10-09-12, 09:10AM   #25
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Looks good to me!!!
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Old 10-09-12, 05:27PM   #26
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Cooler weather is coming........ this week
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Old 10-10-12, 02:41AM   #27
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Still plenty of good days left for racing here too.
The car is out of action until next month.
Pulled the trans out tonight to send it to the doctor for inspection.
I think I may have overcooked it back in July/August before I got the secondary cooler installed.The stall speed/ rear gear mismatch probably did not help matters either.
My own damn fault for being too eager .
3 days after the races the trans front seal developed a leak that turned the car into a Louisiana mosquito fogger! LOL
Trans was going to come out anyway for a different converter (lower stall speed) but this was sooner than I had planned on.
May also be changing the 1st & 2nd planetary gear sets to 2.75 1st & 1.56 2nd.
Checking pricing from Coan & Hughes for those parts.
With the lower 1st & 2nd ratios I can keep my economy rear end gear for the street and get fairly good acceleration from a standing start .Not ready to put an overdrive trans in it just yet
The race tire manufacturers make some short sidewall drag tires that range from 22" dia to 26" dia which would help to crutch my 2 series rear gear when it's time to do some 1/8 mile work.
Have to sit down with the wonder wheel and see what diameter would be optimum for the 1/8th.
That's the distance we have here. No active 1/4 mile until you get to Central Cal /NorCal Nevada or Arizona. With fuel costs what they currently are I cannot justify the cost of the trip. That would be a budget buster for me.
Fontana/Autoclub Dragway is in limbo because the San Bernardino/Riverside NIMBY sound police got an injunction on their operations until they build some type of over engineered sound barrier.
Friggin' railroad runs parallell to the Fontana drag strip and makes all kinds of noise 24/7/365. Railroad is still in business! And so is California Speedway! Go figure.
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Old 10-10-12, 11:39AM   #28
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Just remember that the shorter tire has a smaller contact patch if your hitting it hard off the line.
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Old 10-10-12, 07:19PM   #29
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Yeah it's a tradeoff for sure,have to change/tune the driving style to suit. Its a dual purpose car that will spend more time on the highway than at the drag strip so some compromises will have to be made.
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Old 10-11-12, 07:44PM   #30
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67 Tempest to get back on track here;
What's the status of your project ?
You were talking about retiring the Saginaw 4spd box for a TKO 5 speed change over.
What's all involved with that?
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