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Critique time slip
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DRR Sportsman
posted
Trying to help this guy out are the excrementals way off?
1.568
4.409
6.771
103.56 mph
8.83
10.584
128.73 mph
3200# sbf 400” 3.90 rear c4 trans 8” chance converter
Thank you
 
Posts: 695 | Location: Bucks Co Pa | Registered: January 23, 2003Reply With QuoteReport This Post
DRR Sportsman
Picture of Mike Allred
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It appears to be crawling off the line. 1.45 60’ and 6.50 1/8 mile et are numbers that better match his 1/8th mile mph. I understand he’s racing 1/4 but more gear And/or more traction may help the time slip look more balanced.


Mike Allred
 
Posts: 276 | Location: Fayetteville, NC | Registered: March 10, 2004Reply With QuoteReport This Post
DRR Sportsman
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The 60' is about a tenth or more slow for that mph in my opinion.
If the engine leaves the line cleanly, it's the convertor or suspension in my opinion.



Cool
 
Posts: 621 | Location: Atco, NJ | Registered: March 14, 2002Reply With QuoteReport This Post
DRR Top Comp
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6.50 3250 lbs is 106 - 107, ain't it?

I go 112 holding a little 6.50 index 3250 lbs. I got a home built, do-it-yourselfer sbc though.

This message has been edited. Last edited by: Mike Rietow,
 
Posts: 9398 | Location: Madeira Beach Fl. | Registered: June 12, 2018Reply With QuoteReport This Post
DRR Sportsman
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Trans keeps burning high gear clutches.
Could that have some dragging effect on this?
 
Posts: 695 | Location: Bucks Co Pa | Registered: January 23, 2003Reply With QuoteReport This Post
DRR Pro
Picture of rusty
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quote:
posted January 04, 2021 06:32 AM Hide Post
Trans keeps burning high gear clutches.
Could that have some dragging effect on this?

absolutely


honesty is the best policy,insanity is a better deffense
1.036, 6.16@ 224

 
Posts: 1421 | Location: texas | Registered: February 17, 2006Reply With QuoteReport This Post
DRR Top Comp
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Converter too tight and it needs gear.

What diameter tire is it sir?
 
Posts: 9398 | Location: Madeira Beach Fl. | Registered: June 12, 2018Reply With QuoteReport This Post



DRR S/Pro
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quote:
Originally posted by B.C.Malibu:
Trans keeps burning high gear clutches.
Could that have some dragging effect on this?

Assuming nothing stupid is going on such as shifter linkage not adjusted correctly or ?, find another trans builder, there is no way your combo should be hurting high gear clutches!
 
Posts: 2161 | Location: Tewksbury, MA,USA | Registered: November 03, 2000Reply With QuoteReport This Post
DRR Sportsman
posted Hide Post
quote:
Originally posted by TOP38:
quote:
Originally posted by B.C.Malibu:
Trans keeps burning high gear clutches.
Could that have some dragging effect on this?

Assuming nothing stupid is going on such as shifter linkage not adjusted correctly or ?, find another trans builder, there is no way your combo should be hurting high gear clutches!


I was thinking the same thing. Who did the tranny and what do they say about burning up clutches that there is no way you should be hurting.


BG
 
Posts: 760 | Location: Florence, SC | Registered: August 25, 2019Reply With QuoteReport This Post
DRR Sportsman
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275/60 or 28” tall.
Traps at 6600rpm
 
Posts: 695 | Location: Bucks Co Pa | Registered: January 23, 2003Reply With QuoteReport This Post
DRR Pro
Picture of SlyFox
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Agree with others - look at 60' time. My much slower Chevelle was a tad quicker than you in 60', see below.



Mike
 
Posts: 1570 | Location: Marietta, GA | Registered: December 09, 2005Reply With QuoteReport This Post
DRR Top Comp
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quote:
Originally posted by B.C.Malibu:
275/60 or 28” tall.
Traps at 6600rpm


6600 1/4 mile @ 128 mph, the converter is slipping 0%.

You must mean 1/8 mile? If not the converter is way too snug.

0% at 7800 - 8000 - 8200 rpm, would be an indication the converter is correct.

0% @ 6600 128 mph, says the converter is way too efficient.

Ya gotta be specific, ya gave 1/4 mile data, I can only presume you're speaking 1/4 @ 128 mph.
 
Posts: 9398 | Location: Madeira Beach Fl. | Registered: June 12, 2018Reply With QuoteReport This Post
DRR Sportsman
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The info is for the 1/4 mile with the incremental numbers for the pass.

This message has been edited. Last edited by: B.C.Malibu,
 
Posts: 695 | Location: Bucks Co Pa | Registered: January 23, 2003Reply With QuoteReport This Post
DRR Top Comp
posted Hide Post
quote:
Originally posted by B.C.Malibu:
The info is for the 1/4 mile with the excremental numbers for the pass.


Converter needs a stator & adjustment, this converter wasn't built for a sbf. It should cross around 7300 with the converter right for the cars sbf, slipping 10%.

Then you put a 4.30 gear in it, it'll cross 7600 slipping 6 - 7 %. It'll also et quite a bit better with the 3.90 gear slipping 10%, crossing 7300 rpm, though too.
 
Posts: 9398 | Location: Madeira Beach Fl. | Registered: June 12, 2018Reply With QuoteReport This Post



DRR Sportsman
Picture of FastLane
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Incrementals..as in, increments

FYI.
 
Posts: 397 | Location: Parked... | Registered: May 27, 2007Reply With QuoteReport This Post
DRR Sportsman
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Big Grin
 
Posts: 528 | Location: Southeast | Registered: March 14, 2009Reply With QuoteReport This Post
DRR Pro
Picture of rusty
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3.90 rear gear wow


honesty is the best policy,insanity is a better deffense
1.036, 6.16@ 224

 
Posts: 1421 | Location: texas | Registered: February 17, 2006Reply With QuoteReport This Post
DRR Sportsman
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He has a friend do his c4 who is a trans guy.
Has great luck with aode and gm stuff.
The C4 is kickin his butt though.
 
Posts: 695 | Location: Bucks Co Pa | Registered: January 23, 2003Reply With QuoteReport This Post
DRR Trophy
Picture of the rain maker
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Broken sprag in the converter? Transbrake or footbrake? If transbrake, does it lug the engine going to the two-step?


David Hammons
2014 IHRA Electronics Champion Gulfport Dragway
2016, 2018 IHRA Footbrake Champion Gulfport Dragway
2018, 2019 1000' Footbrake Champion Gulfport Dragway
 
Posts: 73 | Location: gulfport ms | Registered: December 19, 2009Reply With QuoteReport This Post
DRR Sportsman
posted Hide Post
Footbrake car
 
Posts: 695 | Location: Bucks Co Pa | Registered: January 23, 2003Reply With QuoteReport This Post
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