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Beastlikethat1

Member Since 20 Jun 2017
Offline Last Active Jun 20 2018 04:25 AM
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#1552423 How much do drive your vintage Datsun???

Posted by Beastlikethat1 on 19 March 2018 - 06:27 PM

Between my 77 Datsun 620 and my 78 Datsun 280z they are driven every day typically. Probably 10k+ a year between them. Just got a 95 ford ranger to drive around when weather is bad though


#1552421 Datsun 620 ultimate SS exhaust

Posted by Beastlikethat1 on 19 March 2018 - 06:24 PM

Sorry for late reply but the flange was made by me, I plasma cut it out of steel and then drill pressed the holes out.


#1539954 Datsun 620 ultimate SS exhaust

Posted by Beastlikethat1 on 12 January 2018 - 07:38 PM


I can't remember what the stock L20B pipe diameter is, may be 2" but there's no mention of cams, head work and induction. That said I doubt it will flow as much as a 3.5 liter engine. The cross section of a 1 7/8" pipe is 2.75 square inches. If you go to a 2.5" pipe the cross sectional area jumps to 4.9 square inches. Now that's an increase in area of 77% so if a 1/78 pipe works well enough for a 2 liter engine a 2.5" pipe will support a 3.55 liter engine.


Mike, as working at an exhaust shop for 4 years I can agree with you on this. We are one of few shops who only do SS and bend manderal in house. We gurantee 3" manderal tubing for up to 600hp so it would depend on the numbers we are talking, but yes 2.5" should be enough for a 3.5L engine that's NA. Many engines up to 5L even use 2.5in tubing, really the displacement doesn't mean much as far as tubing size is concerned. Just HP and Torque. Or if turbo charged.


#1539892 Datsun 620 ultimate SS exhaust

Posted by Beastlikethat1 on 12 January 2018 - 09:49 AM

I agree Stoffregen, and 2.5in is a great size where it will fit for covering high power. Maybe it's just me but I love the look of the miters, maybe it's just a teenager thing LOL.

And don't get me started on Midas or Mieneki.. haha


#1539866 Datsun 620 ultimate SS exhaust

Posted by Beastlikethat1 on 12 January 2018 - 06:55 AM

Muffler is a 5x11 or 5x8 at 24 inches if I remember correctly. Sounds very deep, no rasp at all. I'll post some video of it, and as far as the miters go we use them on race cars all of the time when manderal bent tubing doesn't have a tight enough radius.


#1539807 Datsun 620 ultimate SS exhaust

Posted by Beastlikethat1 on 11 January 2018 - 10:21 PM

Recently finished my 77 Datsun 620 custom SS exhaust. Most of it was tight welded but the whole system (welds, tubing, muffler and hangers are stainless steel) made by a co-worker and I. Flange was also machined by me with a harbor freight drill press!
2.5in the whole way and 1.75 2 out collectors
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#1531719 pic of your truck

Posted by Beastlikethat1 on 28 November 2017 - 08:49 AM

1977 620 King Cab W/ Titan rims and mirrors mounted on fenders :)

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#1509565 Datsun 620 Engine Swap Clearance

Posted by Beastlikethat1 on 11 August 2017 - 08:47 PM

Hello all, I posted before about the Z24 block with L16 head and Mikunis engine build. I finally got it and so far everything has gone together good. I'm having some clearance issues though that I was wondering for some advice.

One is the Mikuni velocity stacks won't clear the brake booster and the guy before me said he ran a single cylinder W/ no brake booster?

Two is the steering linkage is hitting the oil pan slightly. Not too sure how to handle this one? Dent oil pan some? Or should I swap it.

Third is cross member hitting oil pan a decent amount (can't lower engine all the way on to passenger side engine mount). I do work at a Fab shop so if you all have suggestions on cutting and welding?

PS: Motor was built about 10-13 years ago by a machinist who raced 510's and his main car it was built for was too Rusty and beat up for it to go in. Was built but never ran so hopefully you all will see video soon, I got alot of extras with it such as a more mild cam, a huge jetting kit for the Mikunis, extra 5spd trans, ect.