Sidewinder Heads

[Challenger340]

Just finished a set for a pump gas 505 we are doing.
Not a bad looking little street head at all ? and certainly can't complain for the money ?

2 Heads with SI Valves, $895. U.S. from Todd Marsh at Marsh Performance
http://www.mopartsracing.com/parts/Sidewinder.html

I will post some Flow numbers up tomorrow, OOTB, and then with an 12 Hr Street/Strip port & prep ($1,020. Canadian or about $79.95 U.S. Dollars)

[PRH]

I actually find I can get to the 300 mark a little easier with the Sidewinder than either the RPM or the Stealth.
I like the short turn better.

[Challenger340]

* Sidewinder Heads, 2.14" Intake / 1.81" Exhaust     
* Valves are "SI" brand
* Tested at 28" H2O on SuperFlow SF750 Bench W/Flowcom
* Clay Radius on Intake, NO Pipe on Exhaust



Lift       OOTB       Street Port, Std Port Window/ 45* seat / 30* Backcut
          Intake        Intake             
.050      37.0           39.8             
.100      68.2           75.2
.150    102.2          117.8
.200    139.5          155.6
.300    175.1          189.7
.350    203.0          218.2
.400    242.4          265.6
.450    251.5          280.5
.500    258.1          291.7
.550    262.6          296.8
.600    267.3          300.6
.650    271.1          305.8

Lift     OOTB         Street Port / 45* Seat / 30* Backcut
        Exhaust        Exhaust
.050     28.5            29.1
.100     53.3            59.1
.150     83.5            93.4
.200   104.6           119.4
.250   127.2           137.9
.300   142.3           156.0
.350   155.9           170.8
.400   166.0           181.5
.450   172.7           189.4
.500   177.4           195.8
.550   180.5           201.2
.600   182.8           205.9
.650   184.7           210.5

[Challenger340]

I actually find I can get to the 300 mark a little easier with the Sidewinder than either the RPM or the Stealth.
I like the short turn better.

YUP !      

I also find these Sidewinder's waaaay easier to get to the 300 cfm mark...... versus the RPM or Stealth (harder).

[garner7555]

I actually find I can get to the 300 mark a little easier with the Sidewinder than either the RPM or the Stealth.
I like the short turn better.

YUP !      

I also find these Sidewinder's waaaay easier to get to the 300 cfm mark...... versus the RPM or Stealth (harder).

Wow, yall make me feel good.  (I have Sidewinders)  I never expected people with your expertise to like the Sidewinder better than RPMs or Stealths.     I'm glad to hear that you both like them.   I had Todd Marsh do a bowl blend on mine before he shipped them to me.     

[BSB67]

Thanks for posting guys

[69wannabe]

Do the sidewinder's have straight or angled plug's? Seem's like I remember checking them out before I ordered the stealth's and they had angled spark plug's. Angled plug's are not a deal breaker but the headers I have work better with the straight one's. The sidewinder's were my other option if I didn't wind up going with the stealth's but I actually had forgot about the sidewinder's by the time I got the cash to get some ordered. Hopefully mine will be done soon so I can get started pulling out my engine and making some changes......

[Challenger340]

Do the sidewinder's have straight or angled plug's? Seem's like I remember checking them out before I ordered the stealth's and they had angled spark plug's. Angled plug's are not a deal breaker but the headers I have work better with the straight one's. The sidewinder's were my other option if I didn't wind up going with the stealth's but I actually had forgot about the sidewinder's by the time I got the cash to get some ordered. Hopefully mine will be done soon so I can get started pulling out my engine and making some changes......

Sidewinder's are angled plugs, check header fit during installation, and if using factory manifolds I have NO idea ?   
But then again I can't see why anyone would install the visually "square & chunky" Sidewinder Head on a factory iron exhaust manifold style build ?, or for that matter any build wanting to maintain a somewhat factory engine appearance  (even with Headers). 
Stealth Heads are just fine, so are the Eddy's, just easier to get to the 300 cfm mark using the Sidewinders(IMO), but with the added benefit on the Stealth heads when painted of that "Factory" Engine appearance.

Every Head has it's advantages I guess ?

[b5blue]

Sidewinders plugs clear HP exhaust manifolds fine.

[heyoldguy]

Just finished a set for a pump gas 505 we are doing.
Not a bad looking little street head at all ? and certainly can't complain for the money ?

2 Heads with SI Valves, $895. U.S. from Todd Marsh at Marsh Performance
http://www.mopartsracing.com/parts/Sidewinder.html

I will post some Flow numbers up tomorrow, OOTB, and then with an 12 Hr Street/Strip port & prep ($1,020. Canadian or about $79.95 U.S. Dollars)

That has got to be the nastiest $ exchange rate I have ever seen!

[Troy]

Just finished a set for a pump gas 505 we are doing.
Not a bad looking little street head at all ? and certainly can't complain for the money ?

2 Heads with SI Valves, $895. U.S. from Todd Marsh at Marsh Performance
http://www.mopartsracing.com/parts/Sidewinder.html

I will post some Flow numbers up tomorrow, OOTB, and then with an 12 Hr Street/Strip port & prep ($1,020. Canadian or about $79.95 U.S. Dollars)

That has got to be the nastiest $ exchange rate I have ever seen!

Take my money!

Troy

[Kern Dog]

Eighty bucks to port heads??