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NHRA require sfi engine diapers in 2019 ? #2624936
02/22/19 10:57 PM
02/22/19 10:57 PM
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merpar Offline OP
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I've heard NHRA will require engine diapers for cars 10:90 and quicker. If so at what point do they have to be sfi?

Re: NHRA require sfi engine diapers in 2019 ? [Re: merpar] #2624946
02/22/19 11:13 PM
02/22/19 11:13 PM
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pittsburghracer Offline
"Little"John
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FINALLY!!!!!!!!!!! Thanks for getting on board.


1970 Duster
Edelbrock headed 408
6.143@110.85 mph
9.73@135.05 mph shifting at 6700 RPM
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time




Re: NHRA require sfi engine diapers in 2019 ? [Re: merpar] #2624997
02/23/19 03:45 AM
02/23/19 03:45 AM
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Cotati, CA
Dave Hall Offline
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It's been a rule at the div. and nat. level for a few years now. SFI cert. not required to a certain ET or mph.

Re: NHRA require sfi engine diapers in 2019 ? [Re: merpar] #2625015
02/23/19 09:07 AM
02/23/19 09:07 AM
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Tulsa OK
Bad340fish Offline
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It is a tough deal for us street car guys that need to keep things cool. If I have to I will put one on but I will complain the whole way lol. I totally get and support the purpose it will just be a PITA on my car.

Who has a diaper on a small block A-body with TTI headers? One of the tubes is almost in the oil pan and the centerlink almost touches the milodon pan.

We can probably thank the LS crowd going 8s on salvage motors for this stuff lol.

Last edited by Bad340fish; 02/23/19 09:10 AM.

68 Barracuda Formula S 340
87 "Chrysler" Conquest
Re: NHRA require sfi engine diapers in 2019 ? [Re: merpar] #2625027
02/23/19 10:01 AM
02/23/19 10:01 AM
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Keymar, MD
DusterKid Offline
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Originally Posted By merpar
I've heard NHRA will require engine diapers for cars 10:90 and quicker. If so at what point do they have to be sfi?


Did you just hear that or did you actually see it somewhere from NHRA?

I'd agree with the rule. Yes diapers can be a PIA, but are worth the hassle. I lost my engine going thru the traps in a 11.20 car a few years back and fortunately I only had about a quarter size hole in the bottom of the pan, but crack both sides of the bottom of the block. It sure wasn't the most fun I've had in a car and sure changed how I approach things moving forward.

Re: NHRA require sfi engine diapers in 2019 ? [Re: merpar] #2625038
02/23/19 10:51 AM
02/23/19 10:51 AM
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JERICOGTX Offline
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It's always fun being strapped in, and the guy in front of you oils the track down. Usually at best it's a hour clean up. There are only so many racing hours in a weekend. Don't be the guy that wrecks it for everyone else.

Don't get me wrong, stuff happens, but with what we know today, and the price of a engine diaper, there is no reason to not run one.


69 GTX 68 Road Runner
Re: NHRA require sfi engine diapers in 2019 ? [Re: Bad340fish] #2625059
02/23/19 12:10 PM
02/23/19 12:10 PM
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Val-haul-ass... eventually
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BradH Offline
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Originally Posted By Bad340fish
It is a tough deal for us street car guys that need to keep things cool...

Who has a diaper on a small block A-body with TTI headers? One of the tubes is almost in the oil pan and the centerlink almost touches the milodon pan.

x2

In my case, it would be an RB E-body with TTI headers.

Re: NHRA require sfi engine diapers in 2019 ? [Re: merpar] #2625068
02/23/19 12:19 PM
02/23/19 12:19 PM
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merpar Offline OP
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I have an sfi diaper but date is run out. Haven't had my car on the track yet, should run low 9's possibly hight 8's. So am curious if I should just buy a new one? Thanks guys

Re: NHRA require sfi engine diapers in 2019 ? [Re: merpar] #2625092
02/23/19 01:00 PM
02/23/19 01:00 PM
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Alexandria, LA
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Blucuda413 Offline
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The requirement is levied in class rules and not specifically by ET. In 2018 book bracket racing had no requirement(allowed) while in Superstreet a containment device was required. I assume the 2019 book is the same.

Re: NHRA require sfi engine diapers in 2019 ? [Re: merpar] #2625106
02/23/19 01:27 PM
02/23/19 01:27 PM
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New Smyrna Beach FL
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scottb Offline
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After seeing my motor brake and having a diaper on it and hardly any oil put the bottom end I would not race again with out one is it a pain to get on yes but it’s worth it T he next day I watched a 11:50 car blow his motor and hit the wall 4 times before it came to a stop and totaled out the car both front fenders rear frame rails and quarters with no diaper

Re: NHRA require sfi engine diapers in 2019 ? [Re: merpar] #2625108
02/23/19 01:29 PM
02/23/19 01:29 PM
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merpar Offline OP
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thanks Blucuda, I believe I'll put on what I have. I won't got to the track without one.

Re: NHRA require sfi engine diapers in 2019 ? [Re: Bad340fish] #2625117
02/23/19 01:44 PM
02/23/19 01:44 PM
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North Central, Indiana
Roughbird72 Offline
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Originally Posted By Bad340fish
We can probably thank the LS crowd going 8s on salvage motors for this stuff lol.


They sure didn't help


72 Plymouth Roadrunner 11.08@123.25
Re: NHRA require sfi engine diapers in 2019 ? [Re: Bad340fish] #2625122
02/23/19 02:08 PM
02/23/19 02:08 PM
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Park Forest, IL
slantzilla Offline
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Originally Posted By Bad340fish
It is a tough deal for us street car guys that need to keep things cool. If I have to I will put one on but I will complain the whole way lol. I totally get and support the purpose it will just be a PITA on my car.

Who has a diaper on a small block A-body with TTI headers? One of the tubes is almost in the oil pan and the centerlink almost touches the milodon pan.

We can probably thank the LS crowd going 8s on salvage motors for this stuff lol.


You can also use a belly pan with oil absorbent sheets in it. Might be easier.


"Everybody funny, now you funny too."
Re: NHRA require sfi engine diapers in 2019 ? [Re: merpar] #2625125
02/23/19 02:19 PM
02/23/19 02:19 PM
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Fulton County, PA
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CMcAllister Offline
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All 3 of the .90 classes are required to have an accepted device. Bracket specifications say they are "permitted". No mention of it in S/SS. At this point, I believe it's mostly up to the track. Our local track rules state anything quicker than 10.0 need a oil retention device.


If the results don't match the theory, change the theory.
Re: NHRA require sfi engine diapers in 2019 ? [Re: merpar] #2625142
02/23/19 03:20 PM
02/23/19 03:20 PM
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Harry's Taxi 2 Offline
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I think this is one of the few recent NHRA rules that is a really good idea.


'86 Maple Grove KOS Mopar low qualifier......true street legal with no power adders.

NOS-used when losing since 1940.
Re: NHRA require sfi engine diapers in 2019 ? [Re: Harry's Taxi 2] #2625184
02/23/19 05:53 PM
02/23/19 05:53 PM
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pittsburghracer Offline
"Little"John
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I wish I had my engine out so I could post some pictures of mine. It cost 200.00 some dollars and can lay right on the headers. It measures about 1/4 inch thick. Inwill be picking up another one for my big block soon from our track manager as he sells them for cost.


1970 Duster
Edelbrock headed 408
6.143@110.85 mph
9.73@135.05 mph shifting at 6700 RPM
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time




Re: NHRA require sfi engine diapers in 2019 ? [Re: pittsburghracer] #2625187
02/23/19 06:12 PM
02/23/19 06:12 PM
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mk_ Offline
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Pittsburghracer...... do you know what brand yours is?

Re: NHRA require sfi engine diapers in 2019 ? [Re: mk_] #2625232
02/23/19 08:40 PM
02/23/19 08:40 PM
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pittsburghracer Offline
"Little"John
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Originally Posted By SSAHfan
Pittsburghracer...... do you know what brand yours is?



I’ll find out. Pretty sure it’s made in Ohio. May be j&j but let me check. I know it’s universal and comes in two sizes.


1970 Duster
Edelbrock headed 408
6.143@110.85 mph
9.73@135.05 mph shifting at 6700 RPM
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time




Re: NHRA require sfi engine diapers in 2019 ? [Re: pittsburghracer] #2625290
02/23/19 11:56 PM
02/23/19 11:56 PM
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Taxes & Virus's R-US, NY
Dragula Offline
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Here is my "street" car at 108mph, loosing a rod out EACH side of the block...Pretty sure had I not had one on, the car would be toast...Not a drop of oil on the track, 10 quarts of oil....I use a DRE system on both of my cars with Big tube headers....

IMG959877.jpgIMG959880.jpgKIMG0153-1.jpg
Last edited by Dragula; 02/24/19 12:01 AM.

'70 Cuda,...605 Hemi Street Car (6.20 best pass, 1.33 60ft)
https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car)
https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car)
https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9)

G3 Ported Edelbrock Hemi Heads ready to use for sale
Re: NHRA require sfi engine diapers in 2019 ? [Re: mk_] #2625415
02/24/19 12:34 PM
02/24/19 12:34 PM
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pittsburghracer Offline
"Little"John
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Originally Posted By SSAHfan
Pittsburghracer...... do you know what brand yours is?



Greg told me today they are from J&J Performance.


http://jjperformance.com/NHRA-Accepted-Engine-Diapers_c5.htm


1970 Duster
Edelbrock headed 408
6.143@110.85 mph
9.73@135.05 mph shifting at 6700 RPM
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time




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