What psi to run in Nitto Drag Radials - Northern California Ford Owners

This is topic What psi to run in Nitto Drag Radials in forum Tech Talk at Northern California Ford Owners .

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Posted by BlackDrop50 (Member # 1715) on :

I just mounted up my new nittos today, what PSI am I supposed to run in them on the street and track? I put in 28 right now, I'm thinking 15-18 at the track? They hook pretty damn good right now and it doesn't seem to handle bad or look low on air.

Posted by RixSikCobra (Member # 5058) on :

I would think they would grab at 28 [Eek!]

Mine are suppose to be 40, I checked mine with chalk to see how low I could go before the tire started to slip on the rim when you dig, it slipped at 31 psi! So I run mine at 38 on the street and about 33 when I know I'm draggin'. I have 555r2's. You can check your own to see where yours slip, if yours don't slip at 28 leave em there, that's low though:patriot:

Edit: these tires rock, huh? Wait 'til they break in just a tad [Whoo Whooooo!]

[ March 31, 2005, 10:12 PM: Message edited by: RixSikCobra ]

Posted by 03SVTPower (Member # 518) on :

time to bolt the tire to the rim!! [patriot]

Posted by AJBlackGT (Member # 3936) on :

Yeah I have mine at about 30 psi. I havent been to the track with them, but i would think they'd hook pretty good around 16psi at the track.

Posted by Yellow94GT (Member # 431) on :

How low you run them at the track depends on how wide and short/tall the tire is. I used to run 315/35/17's and with those you didn't want to go under 18 psi at the track or they would start spinning, (not spinning on the rim, just losing traction). On the street, um, I think I ran them at about 25 psi [Smile]

FWIW, I run my the BFG DR's that I have now at 24 psi for the track and the street [patriot]

Posted by BlackDrop50 (Member # 1715) on :

Yeah I think I'll leave them at 28 and bump it up a little if I'm going to drive on the freeway for a bit. I'll just drop em to around 18-20 at the track.

These things hook really damn good though. I've been so used to spinning, then I just warmed them up a little with 15 min of driving and went full throttle in second and it just grabbed and squatted and took off hard! I just have to go about half throttle in first and ease into it. Haven't got em too hot yet because I just wanted to heat cycle them first. It's fun as fuck to take off hard from a stoplight!

Hey Rick you have the road racing Nittos? I was thinking about getting those instead, how do they handle and hook?

Posted by RixSikCobra (Member # 5058) on :

quote:
Originally posted by BlackDrop50:
Yeah I think I'll leave them at 28 and bump it up a little if I'm going to drive on the freeway for a bit. I'll just drop em to around 18-20 at the track.

These things hook really damn good though. I've been so used to spinning, then I just warmed them up a little with 15 min of driving and went full throttle in second and it just grabbed and squatted and took off hard! I just have to go about half throttle in first and ease into it. Haven't got em too hot yet because I just wanted to heat cycle them first. It's fun as fuck to take off hard from a stoplight!

Hey Rick you have the road racing Nittos? I was thinking about getting those instead, how do they handle and hook?

Sup? They hook great and handle awesome. Comin' outta corners they grab real well. I can dig way better now, also. I got a good nuff hook to be THOSE STI's last night [Whoo Whooooo!]

.

I guess I can go lower based on what everyone else is saying. I guess it doesn't matter if it moves on the rim? I was told that that is no bueno, but that was just one person. I'll try going down to 20 when I know I'm gonna drag. [patriot]

Posted by Cobra5.0JEEP (Member # 1482) on :

quote:
Originally posted by RixSikCobra:
I would think they would grab at 28 Mine are suppose to be 40, I checked mine with chalk to see how low I could go before the tire started to slip on the rim when you dig, it slipped at 31 psi! So I run mine at 38 on the street and about 33 when I know I'm draggin'. I have 555r2's. You can check your own to see where yours slip, if yours don't slip at 28 leave em there, that's low though:patriot:

Edit: these tires rock, huh? Wait 'til they break in just a tad

wow i ran my Nittos at 18psi at the track.

[ April 01, 2005, 11:58 AM: Message edited by: Cobra5.0JEEP ]

Posted by HungryHippo (Member # 537) on :

the RII's have a stiffer sidewawll and made for cornering so they need more psi

Posted by RixSikCobra (Member # 5058) on :

See, I knew wasn't goin' crazy....any more than normal anyway [Razz]

Posted by 4.6 EATIN GM'S (Member # 1633) on :

mine on my car seemed to hook best between 15 and 18psi.and thats how i ran it on the street or the track.
these are on a 17x9.5 rim also

Posted by TRIXSNK (Member # 2844) on :

I run my Nitto 315/35 daily at 28psi and drop them to around 18psi at the track and with a sorry ass burn-out they still hooked very good but that was before jump in HP [Razz]

Posted by 1WICKEDmach (Member # 4060) on :

I run mine at 25psi on the street at the track i drop the pressure to 15.

Posted by BlackDrop50 (Member # 1715) on :

I dropped it down to 25 today, slight bulge but hardly noticeable, shit hooks HARD. It was a little warm today so 1st gear hooks all the way through, 2nd gear rips. Even when I slip the clutch a little it just GRABS. Only bad thing is it seems to slightly ride rougher and it doesn't seem to handle the greatest, I don't feel that great taking curves fast anymore but oh well, gotta bump the PSI up a little for that.

I wonder what will happen with 15psi and 4000rpms clutch slip LOL [burnout]

[ April 05, 2005, 01:27 PM: Message edited by: BlackDrop50 ]

Posted by AJBlackGT (Member # 3936) on :

What size are they again jason?
I've got 275s and if you heat em real good you can drop the clutch at 4 grand and they'll hook

Posted by BlackDrop50 (Member # 1715) on :

They are 275/40/17s, they hook good with no burnout that's what I like, I've only done a couple launches, 28psi 10-15 foot burnout and 2500 rpms the car launches pretty good, I'm going to try with 25 and a little more rpms but I need to get my torque boxes welded up first! [burnout]

Posted by AJBlackGT (Member # 3936) on :

Yeah i havent given mine that many launches either cause i still have to get my boxes welded too, i just wanted to see what they could do [Big Grin]

Posted by BlackDrop50 (Member # 1715) on :

I just ordered these http://sfcart.umiperformance.com/1001.aspx

Check em out only $120 for lowers+uppers, a lot less than wild rides battle boxes and it looks exactly the same, gonna weld these suckers in next week

Posted by TRIXSNK (Member # 2844) on :

quote:
Originally posted by AJBlackGT:
What size are they again jason?
I've got 275s and if you heat em real good you can drop the clutch at 4 grand and they'll hook

This is coming from an IRS perspective but i don't think i'll ever be able to dump the cltuch at any rpm no matter how long a burn-out i do on Nitto's.....i always have to slip it a little and that's on the street let alone at the track [Frown]

Posted by AJBlackGT (Member # 3936) on :

quote:
Originally posted by TRIXSNK:

quote:
Originally posted by AJBlackGT:
What size are they again jason?
I've got 275s and if you heat em real good you can drop the clutch at 4 grand and they'll hook
This is coming from an IRS perspective but i don't think i'll ever be able to dump the cltuch at any rpm no matter how long a burn-out i do on Nitto's.....i always have to slip it a little and that's on the street let alone at the track

Yeah i've never driven an IRS mustang but i still dont think the nittos would hook close to 500rwhp when you dump it anyway, i only have around 300rwhp off the bottle. [burnout]

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