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Beastlikethat1

Member Since 20 Jun 2017
Offline Last Active Jun 20 2018 04:25 AM
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Posts I've Made

In Topic: How much do drive your vintage Datsun???

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

In Topic: Datsun 620 ultimate SS exhaust

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.

In Topic: Datsun 620 ultimate SS exhaust

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.

In Topic: Datsun 620 ultimate SS exhaust

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

In Topic: Datsun 620 ultimate SS exhaust

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.