Messages

16

Dan Dishon's Transmission Den / Re: Converter design information

« on: December 07, 2016, 12:54:33 PM »

Great discussion.
Does anyone has any books about converters that you could recommend?

17

Dan Dishon's Transmission Den / Converter design information

« on: December 03, 2016, 07:48:51 AM »

I'm planing to get a new torque converter for the PG in my FED.
The local converter builder I have spoken with says that the only info needed to build the converter is the maximum torque and the engine speed where max torque occurs. Other converter builders wants a ton of info.
Therefore I feel like I need to understand how a torque converter is designed.
When I look around the internet I only find advertising from transmission companies and basic articles in magazines.
Where can I find true scientific information about the design of a torque converter? I'm thinking of SAE papers, literature for the university and similar, or other technical information.
Does any one has any suggestions?

18

Matt Shaff's Engine Shop / Re: Shaft mount rockers SBC

« on: November 26, 2016, 11:22:35 AM »

You might be right. Shaft mount rockers are a to big investment in these heads.
I have been running 3/8" rocker arm studs with a girdle for some years with out any problems. Spring pressure is around 550 lbs and lift is around .710"
Will this still work with .150" stud mounted offset rockers?

19

Matt Shaff's Engine Shop / Shaft mount rockers SBC

« on: November 16, 2016, 01:25:48 PM »

I have a set of old Brownfield heads on my 350" SBC in my FED. The intake rockers are slightly rotated due to moved/bigger valves and rocker studs on standard location. I do not like this and has started to look for some shaft mount rockers to once and for all fix this. I need 1.5 ratio and around 0.250" offset on the intake rockers to clear the intake runner. The cam lift is 0.735" in and 0.685" out, spring pressure is about 620 lbs. Max engine speed around 8500 rpm.
When I look at the high quality brands, Jesel, Comp cams, Scorpions they are about $1000 - $1300.
I don't have the hottest cam and springs around, could I get away with something less expensive? Are there any other manufacturer of shaft rocker for SBC with a more affordable price?

BR

20

Dan Dishon's Transmission Den / Max hp with 1.82 gear set?

« on: September 19, 2016, 12:24:26 PM »

I'm running a FED with a 350" sbc and a shorty PG.
The planetary is a standard stampeld steel with 1.82 helical gears. FED is about 1400 punds. Best 60' is 1.21 sec. Best 1/4 is 8.26 sec.
How much more will it take? Is it time to change to a straight cut gear set?

21

Electronics / Re: wheelie bar sensor

« on: August 10, 2016, 09:47:30 PM »

noslin and others:
Which datalogger, brand and model, do you use?

22

Front Engine Dragsters / Re: Save missmatched slicks?

« on: August 08, 2016, 09:50:48 PM »

I have switched back to my old slicks and all the compensating is gone. It runs straight as an arrow.
So the problem is/was the slicks.
If the tires can't be fixed, is there some other classes/cars that is less sensitive to dirrerances in tire circumference?
Can some one have use for them or is track prep the only thing left?

23

Front Engine Dragsters / Re: Save missmatched slicks?

« on: August 05, 2016, 10:57:42 AM »

I'm running 8.31 sec 162mph.
I have to compensate with the steering wheel in high speeds with these tires. The front tires are worn from compensating.
They are 2 years old. No cracks what I can see.
Ther was fairly equal when I bought them. But after first race they where off by about 1" in circumference.

24

Front Engine Dragsters / Save missmatched slicks?

« on: August 05, 2016, 05:17:51 AM »

I have a pair of M&H Racemaster slicks that has about 1/2" - 3/4" differensen in circumference.
I have tried all possible ways of stretching the smallest tire. High pressure over long time, high pressure out in the sun. It helps for the moment but they always end up with the same difference after some hours.
Is there any way of saving these slicks? Or should I consider them lost and give them to the race track to use for preparation?

25

Matt Shaff's Engine Shop / Re: Time for a rebuild?

« on: August 24, 2015, 10:50:13 AM »

I start my oil heater in the morning and use it all the time during the day exept during the race. I have built a tempersture controller to make sure the oil wouldnt burn.
I can see a big decreas of alky in the oil when heating so I suppose it i a good thing to do.

26

Matt Shaff's Engine Shop / Re: Time for a rebuild?

« on: August 22, 2015, 09:33:02 AM »

I had similar problems with my alky injected sbc. Used the same Fram oil filter and Valvoline vr1 racing 20w-50 oil. Found the glitter up in the oil channel to the lifters. It must have bypassed the oil filter due to cold and thick oil. Also lost oil pressure when braking after the finnish line. My glitter came from the main and rod bearings.
My solution to this was to change to a K&N oil filter and kendall gt1 20w-50 oil. Install an oil heater and an accusump.
I pre heat the oil to keep the oil filter from bypassing due to thick oil. The accusump prevents the loss of oil pressure when braking. I have a milodon full length pan with trap doors and 7qt in it. But it didnt keep the engine from loosing pressure when braking.
My accusump is the 3qt modell. I run a total of 10qt in the engine now. 7qt in the engine and 3qt in the accusump. Problems are gone. Planing on decreasing the amount of oil a bit for next season.

27

Drag Racing / Re: Which data logger for a FED?

« on: February 11, 2015, 11:07:47 AM »

Any one with any experience of Racepak and Computech?
Are there any other brands that are used out there?

28

Drag Racing / Which data logger for a FED?

« on: February 08, 2015, 02:21:27 AM »

I'm planing to get a data logger for my FED. I have been looking for a while but haven't found any that feels 100% right.
What data logger systems are you running? What experiences do you have, which systems are good and which once are great?

My FED has 150" WB runs a NA sbc with alky injection, mag and a PG trans.

I want a system that have lots of channels since I plan to record pretty much everything I can. All from EGT to mag current to wheelie bar speed.
The system needs to be compatible with universal sensors, for example to scale a 0-5 Volt signal from a universal sensor to what ever unit it measures. And the same for sensors that has a pulse/frequency output. It would also be good if the logger had a CAN-bus that could be used to connect other sensors.

I have seen that some data loggers has a display unit. I do not see the benefits of that and would rather have the possibility to use a Laptop to view the sensors online.

What could you recommend?

29

Spud Miller's Cave / Re: Bigger mag for more power?

« on: October 08, 2014, 12:58:19 PM »

The cam is an Isky rr-735.
Dur in 278°, dur out 286° @ .050".
Overlap is 111°
Do you think the cam is long enough to be able to skip the toluene?

30

Spud Miller's Cave / Re: Bigger mag for more power?

« on: October 08, 2014, 10:35:34 AM »

I might try some Fuel next season. Just to make sure the 7 sec run will be there.
I have stock main caps, alu rods, forged steel crank and forged pistons. Around 14:1 in CR. Stack injected sbc.
I have read in Spuds nitro notes that above 25% the stock main caps might crack.
So around 20% seams to be "safe".
BUT, will my SprintMag handle this? Lets say the SprintMag will be recharged and in perfect condition.
Or do I have to move up to a SuperMag?